F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONSMOUNTINGS FOR SMALLARMS OR ORDNANCE This subclass covers those features or details which are considered to be of a kind generally applicable to, or to be concerned with intrinsic functions common to, both smallarms and ordnance. Such features or details are classified in this subclass, even if they are stated to be applied only to smallarms or only to ordnance. Attention is drawn to the definitions given in Note (2) following the title of class F41. In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. F41A1/00 F41A1/00Missile propulsion characterised by the use of explosive or combustible propellant charges projecting missiles without use of explosive or combustible propellant charge F41B; launching rockets or torpedoes F41F3/00; missile self-propulsion F42B15/00 F41A1/02Hypervelocity missile propulsion using successive means for increasing the propulsive force, e.g. using successively initiated propellant charges arranged along the barrel lengthMultistage missile propulsion F41A1/04Missile propulsion using the combustion of a liquid, loose powder or gaseous fuel, e.g. hypergolic fuel F41A1/06Adjusting the range without varying elevation angle or propellant charge data, e.g. by venting a part of the propulsive charge gases, or by adjusting the capacity of the cartridge or combustion chamber adjusting the range by using gas-relieving ports in the barrel F41A21/28 F41A1/08Recoilless guns, i.e. guns having propulsion means producing no recoil F41A1/10a counter projectile being used to balance recoil F41A3/00Breech mechanisms, e.g. locks F41A3/02Block action, i.e. the main breech opening movement being transverse to the barrel axis F41A3/04with pivoting breech-block F41A3/06about a horizontal axis transverse to the barrel axis at the rear of the block F41A3/08 takes precedence F41A3/08carrying a rotably mounted obturating plug of the screw-thread or the interrupted-thread type F41A3/30 takes precedence F41A3/10with sliding breech-block, e.g. vertically F41A3/12Bolt action, i.e. the main breech opening movement being parallel to the barrel axis F41A3/14Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively F41A3/16the locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks F41A3/18hand-operated F41A3/20Straight-pull operated bolt locks, i.e. the operating hand effecting only a straight movement parallel to the barrel axis F41A3/22the locking being effected by rotating the operating handle or lever transversely to the barrel axis F41A3/24the locking elements forming part of the operating handle or lever F41A3/26semi-automatically or automatically operated, e.g. having a slidable bolt-carrier and a rotatable bolt F41A3/28having fixed locking elements on the non-rotating bolt and rotating locking elements mounted on the barrel or breech housing, e.g. rotatable rings F41A3/30Interlocking means, e.g. locking lugs, screw threads F41A3/32the bolt being rocked about a notional axis transverse to the barrel axis F41A3/34the bolt additionally effecting a sliding movement transverse to the barrel axis F41A3/36Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing F41A3/38having rocking locking elements, e.g. pivoting levers or vanes F41A3/40mounted on the bolt F41A3/42 takes precedence F41A3/42hand-operated F41A3/44having sliding locking elements, e.g. balls, rollers F41A3/46mounted on the bolt F41A3/48 takes precedence F41A3/48hand-operated F41A3/50Toggle-joint locks, e.g. crank-operated F41A3/52hand-operated F41A3/54Bolt locks of the unlocked type, i.e. being inertia operated F41A3/56the bolt being provided with an additional slidable mass F41A3/58Breakdown breech mechanisms, e.g. for shotguns F41A3/60Breech mechanisms for guns having two or more barrels F41A3/58 takes precedence; for revolving-cannon guns F41F1/10 F41A3/62using combustion gas pressure for adding to the mechanical locking action, or for delaying breech opening movement F41A3/64Mounting of breech-blocksAccessories for breech-blocks or breech-block mountings F41A3/66Breech housings or framesReceivers F41A3/68Bolt stops, i.e. means for limiting bolt opening movement F41A3/70Anti-rebound arrangements, i.e. preventing rebound of the bolt out of the firing position safeties for locking the breech-block or bolt in a safety position F41A17/42 F41A3/72Operating handles or leversMounting thereof in breech-blocks or bolts F41C7/02, F41C7/06 take precedence F41A3/74Obturating or packing devices for gas leak prevention in breech mechanisms F41A3/76specially adapted for sealing the gap between the forward end of the cartridge chamber and the rearward end of the barrel, e.g. sealing devices for revolvers or revolver-type guns F41A3/78Bolt buffer or recuperator means F41A3/80Adjustable spring buffers F41A3/82Coil spring buffers F41A3/80 takes precedence F41A3/84mounted within the gun stock F41A3/86mounted under or above the barrel F41A3/88mounted around the barrel F41A3/90Fluid buffers F41A3/62 takes precedence F41A3/92adjustable F41A3/94in combination with spring buffers F41A5/00Mechanisms or systems operated by propellant charge energy for automatically opening the lock F41A5/02recoil-operated F41A5/04the barrel being tilted during recoil F41A5/06the barrel being rotated about its longitudinal axis during recoil F41A5/08having an accelerator lever acting on the breech-block or bolt during the opening movement F41A5/10having a movable inertia weight , e.g. for storing energy F41A5/12mounted in a gun having a fixed barrel F41A5/14Barrel stops, i.e. devices for holding the recoiling barrel in a predetermined position, e.g. the recoil position F41A5/16having a barrel moving forwardly after the firing of a shot F41A5/18gas-operated F41A5/20using a gas piston arranged concentrically around the barrel F41A5/22having two or more gas pistons F41A5/24by direct action of gas pressure on bolt or locking elements F41A5/26Arrangements or systems for bleeding the gas from the barrel F41A5/20 - F41A5/24 take precedence F41A5/28Adjustable systems F41A5/30Gas- or recoil-operated, e.g. selection of gas- or recoil-operated systems F41A5/32Energy accumulator systems, i.e. systems for opening the breech-block by energy accumulated during barrel or gas piston recoil F41A5/34with spring accumulators F41A5/36with fluid accumulators F41A7/00Auxiliary mechanisms for bringing the breech-block or bolt or the barrel to the starting position before automatic firingDrives for externally-powered gunsRemote-controlled gun chargers F41A7/02Machine gun rechargers, e.g. manually operated F41A3/72 takes precedence F41A7/04fluid operated F41A7/06electrically operated F41A7/08Drives for externally-powered guns, i.e. drives for moving the breech-block or bolt by an external force during automatic firing F41A7/10using a rotating cylindrical drum having a camming groove F41F1/10 takes precedence F41A9/00Feeding or loading of ammunition conveying ammunition through pipes by the action of flowing gases B65G51/025 ; adaptations for feeding or loading missiles from magazines in air guns F41B11/50MagazinesGuiding means for the extracting of cartridges cartridge extractors or ejectors F41A15/00 F41A9/01Feeding of unbelted ammunition F41A9/02using wheel conveyors, e.g. star-wheel-shaped conveyors F41A9/03using screw or rotary-spiral conveyors F41A9/04using endless-chain belts carrying a plurality of ammunition F41A9/05in tandem sequence F41A9/06using cyclically moving conveyors, i.e. conveyors having ammunition pusher or carrier elements which are emptied or disengaged from the ammunition during the return stroke F41A9/07Reciprocating conveyors, i.e. conveyors pushing a plurality of ammunition during the feeding stroke F41A9/09Movable ammunition carriers or loading trays, e.g. for feeding from magazines locking of ammunition in ammunition containers or loading trays F42B39/22 F41A9/10pivoting or swinging F41A9/11in a horizontal plane F41A9/12mounted within a smallarm F41A9/13in a vertical plane F41A9/14which is transverse to the barrel axis F41A9/15mounted within a smallarm F41A9/16which is parallel to the barrel axis F41A9/17mounted within a smallarm F41A9/18feeding from a tubular magazine under the barrel F41A9/19feeding from a tubular magazine mounted in the stock F41A9/20sliding, e.g. reciprocating F41A9/21in a vertical direction F41A9/23 takes precedence F41A9/22in a horizontal direction F41A9/23 takes precedence F41A9/23mounted within a smallarm F41A9/24using a movable magazine or clip as feeding element F41A9/25using a sliding clip F41A9/26using a revolving drum magazine F41A9/27in revolver-type guns F41A9/28of smallarm type in revolvers F41C3/14 F41A9/29Feeding of belted ammunition F41A9/30Sprocket-type belt transporters F41A9/31with cartridge stripping means F41A9/32Reciprocating-slide-type belt transporters F41A9/33with cartridge stripping means F41A9/34from magazines magazines for belted ammunition per se F41A9/79 F41A9/35Feeding multibarrel guns Feeding elements or concepts of general interest, not specially adapted for feeding multibarrel guns, are classified in groups F41A9/01 or F41A9/29. F41A9/36Feed mechanisms for revolving-cannon guns F41A9/37Feeding two or more kinds of ammunition to the same gunFeeding from two sides F41A9/375Feeding propellant charges and projectiles as separate units Feeding elements or concepts of general interest, not specially adapted for feeding two or more kinds of ammunition or from two sides, are classified in groups F41A9/01 - F41A9/29. F41A9/38Loading arrangements, i.e. for bringing the ammunition into the firing position F41A9/39Ramming arrangements F41A9/40the breech-block itself being the rammer F41A9/41pushing unbelted ammunition from a box magazine on the gun frame into the cartridge chamber F41A9/42Rammers separate from breech-block F41A9/43Chain rammers F41A9/44Fluid-operated piston rammers F41A9/45the cartridge chamber or the barrel as a whole being tiltable or transversely slidable between a loading and a firing position F41A9/25 and F41A9/27 take precedence F41A9/46the cartridge chamber being formed by two complementary elements, movable one relative to the other for loading F41A9/47using forwardly-sliding barrels or barrel parts for loading F41A9/48Loading by gravitational force F41A9/49Internally-powered drives, i.e. operated by propellant charge energy, e.g. couplings, clutches, energy accumulators F41A9/50External power or control systems F41A9/51Boosters, i.e. externally-powered motors F41A9/52Arrangements for changing from automatic or magazine-loading to hand-loading F41A9/53Charged-condition indicators, i.e. indicating the presence of a cartridge in the cartridge chamber F41A9/54Cartridge guides, stops or positioners, e.g. for cartridge extraction F41A9/55Fixed or movable guiding means, mounted on, or near, the cartridge chamber F41A9/56Movable guiding means F41A9/55 takes precedence F41A9/57Flexible chutes, e.g. for guiding belted ammunition from the magazine to the gun F41A9/58Cartridge stopsCartridge positioners F41A9/59Ejectors for clips or magazines, e.g. when empty F41A9/60Empty-cartridge-case or belt-link collectors or catchers F41A9/81 takes precedence F41A9/61Magazines F41A9/62having means for indicating the number of cartridges left in the magazine, e.g. last-round indicators last-round safeties F41A17/40 F41A9/63specially adapted for releasable connection with other magazines F41A9/64for unbelted ammunition F41A9/65Box magazines having a cartridge follower F41A9/66Arrangements thereon for charging, i.e. reloading apparatus or tools for reloading of magazines F41A9/83 F41A9/67having means for depressing the cartridge follower, or for locking it in a depressed position F41A9/68Plural magazines, e.g. tandem magazines Arrangements of cartridges in two or more independent rows or channels which are selectively or sequentially brought into operative position F41A9/69characterised by multiple-row or zigzag arrangement of cartridges F41A9/70Arrangements thereon for discharging, e.g. cartridge followers or discharge throats F41A9/71Arrangements thereon for varying capacityAdapters or inserts for changing cartridge size or type F41A9/72Tubular magazines, i.e. magazines containing the ammunition in lengthwise tandem sequence F41A9/73Drum magazines F41A9/74with radially disposed cartridges F41A9/75having a spiral cartridge channel F41A9/76Magazines having an endless-chain conveyor F41A9/77Magazines having a screw conveyor F41A9/78Magazines having a reciprocating conveyor F41A9/79for belted ammunition F41A9/80having provision for quick-coupling of the belts of adjacent magazines F41A9/81having provision for collecting belt links or empty cartridge cases F41A9/82Reloading or unloading of magazines F41A9/83Apparatus or tools for reloading magazines with unbelted ammunition, e.g. cartridge clips F41A9/84Clips F41A9/85for reloading revolver-type magazines F41A9/86Feeding belted ammunition into magazines F41A9/87Ammunition handling dollies or transfer carts F41A9/86 takes precedence F41A11/00Assembly or disassembly featuresModular conceptsArticulated or collapsible guns F41A3/64, F41A19/10 - F41A19/15, F41A21/48, F41A25/26 take precedence F41A11/02Modular concepts, e.g. weapon-family concepts F41A11/04Articulated or collapsible guns, i.e. with hinged or telescopic parts for transport or storage breakdown shotguns or rifles F41C7/11; folding or telescopic stocks or stock parts F41C23/04 F41A11/06Telescopic guns F41A13/00Cooling or heating systemsBlowing-through of gun barrelsVentilating systems F41A13/02Heating systems F41A13/04Injecting fluids into barrels or cartridge chambers F41A13/08 takes precedence F41A13/06Evacuating combustion gas from barrels F41A13/10 takes precedence F41A13/08Bore evacuators, i.e. chambers disposed around barrels for storing part of the combustion gas and subsequently injecting it into the barrel to provide suction F41A13/10Blowers or turbines for evacuating or cooling guns, e.g. driven by combustion gas pressure or recoil F41A13/12Systems for cooling the outer surface of the barrel F41A13/10, F41A21/24 take precedence F41A15/00Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamberCartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun F41A9/54, F41C9/08 take precedence; Means for removing duds or misfires in rocket throwers F41F3/058 F41A15/02for revolver-type guns, e.g. revolvers F41A15/04specially adapted for cartridge cases being deformed when fired, e.g. of plastics F41A15/06for breakdown guns F41A15/08for block-action guns F41A15/10of sliding-block type F41A15/12for bolt-action guns F41A15/14the ejector being mounted on or within the bolt; Extractors per se F41A15/16the ejector being mounted on the breech housing or frame F41A15/18for guns with forwardly slidable barrels F41A15/20specially adapted for caseless-ammunition duds F41A15/22Tools for extracting cartridges F41A17/00Safety arrangements, e.g. safeties F41A17/02Key-operated safeties F41A17/44 takes precedence F41A17/04Safeties of the combination-lock type F41A17/02 takes precedence F41A17/06Electric or electromechanical safeties F41A17/04, F41A17/08 take precedence F41A17/063comprising a transponder F41A17/066having means for recognizing biometric parameters, e.g. voice control, finger print or palm print control F41A17/08for inhibiting firing in a specified direction, e.g. at a friendly person or at a protected area F41A27/02 takes precedence F41A17/10Firing mechanisms with elevation stop F41A17/12Firing mechanisms with anti-canting safety F41A17/14Double-loading prevention F41A17/16Cook-off prevention, i.e. prevention of spontaneous firing of a cartridge by chamber wall heat F41A17/18Hang-fire prevention F41A17/20Grip or stock safeties, i.e. safeties disengaged by clasping the grip or stock thumb-operated sliding safeties F41A17/52, F41A17/62, F41A17/70, F41A17/80 F41A17/22acting on the trigger F41A17/24acting on the firing pin F41A17/26acting on the hammer F41A17/28acting on the sear F41A17/30Multiple safeties, i.e. one safety element acting on at least one element of the firing mechanism and at least one other element of the gun, e.g. the moving barrel F41A17/32the other element being the breech-block or bolt F41A17/34Magazine safeties F41A17/36locking the gun automatically in a safety condition when the magazine is empty or removed F41A17/44 takes precedence F41A17/38Magazine mountings, e.g. for locking the magazine in the gun F41A17/40Last-round safeties F41A17/34 takes precedence F41A17/42Safeties for locking the breech-block or bolt in a safety position F41A17/32, F41A17/36, F41A17/40 take precedence ; anti-rebound arrangements F41A3/70 F41A17/44Safety plugs, e.g. for plugging-up cartridge chambers , barrels, magazine spaces F41A17/46Trigger safeties, i.e. means for preventing trigger movement F41A17/02 - F41A17/40 take precedence F41A17/48Automatically operated trigger safeties, i.e. operated by breech opening or closing movement F41A17/50by breakdown action F41A17/52Thumb-operated sliding safeties mounted on the upside of the stock, e.g. for shotguns F41A17/54Protecting-caps for trigger guardsTrigger locking pieces mounted on, or within, the trigger guard F41A17/56Sear safeties, i.e. means for rendering ineffective an intermediate lever transmitting trigger movement to firing pin, hammer, bolt or sear F41A17/02 - F41A17/40 take precedence F41A17/58automatically operated, i.e. operated by breech opening or closing movement F41A17/60by breakdown action F41A17/62Thumb-operated sliding safeties mounted on the upside of the stock, e.g. for shotguns F41A17/64Firing-pin safeties, i.e. means for preventing movement of slidably- mounted strikers F41A17/02 - F41A17/40 take precedence F41A17/66automatically operated, i.e. operated by breech opening or closing movement F41A17/68by breakdown action F41A17/70Thumb-operated sliding safeties mounted on the upside of the stock, e.g. for shotguns F41A17/72trigger-operated, i.e. the movement of the trigger bringing a firing-pin safety into inoperative position during the firing F41A17/74Hammer safeties, i.e. means for preventing the hammer from hitting the cartridge or the firing pin F41A17/02 - F41A17/40 take precedence F41A17/76automatically operated, i.e. operated by breech opening or closing movement F41A17/78by breakdown action F41A17/80Thumb-operated sliding safeties mounted on the upside of the stock, e.g. for shotguns F41A17/82trigger-operated, i.e. the movement of the trigger bringing a hammer safety into inoperative position during firing F41A19/00Firing or trigger mechanismsCocking mechanisms F41A19/01Counting means indicating the number of shots fired F41A19/02Burst limiters F41A19/67 takes precedence F41A19/03Shot-velocity control F41A3/78, F41A5/28, F41A19/05, F41A19/66 take precedence F41A19/04by controlling the time of release of the firing pin or hammer F41A19/05Synchronising for firing through the propeller of an aircraft F41A19/06Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanismsF41A19/01 - F41A19/05, F41A19/59 take precedence F41A19/07press-button actuated, e.g. with thumb rest F41A19/08remote actuatedlanyard actuated F41A19/09Auxiliary trigger devices F41A19/08 takes precedence F41A19/10TriggersTrigger mountings F41A19/11Trigger guardsTrigger-guard mountings F41A19/15 takes precedence F41A19/12SearsSear mountings F41A19/13Percussion or firing pins, i.e. fixed or slidably-mounted striker elementsMountings therefor F41A19/26 takes precedence F41A19/14Hammers, i.e. pivotably-mounted striker elementsHammer mountings F41A19/15Modular firing mechanism units F41A19/16Adjustable firing mechanismsTrigger mechanisms with adjustable trigger pull F41A19/17 takes precedence F41A19/17Hair-trigger mechanisms F41A19/18for multibarrel guns or multiple gunsF41A19/68 takes precedence F41A19/183for multiple guns, i.e. a plurality of guns being actuated by a single firing mechanism F41A19/186having only one striker element and more than one trigger, each trigger acting on a single element firing mechanisms having only one trigger and only one striker element F41A19/22 F41A19/19with single-trigger firing possibility F41A19/20Double-trigger arrangements having the possibility of single-trigger actuation F41A19/21having only one trigger F41A19/22and only one striker element F41A19/23rotatable about an axis parallel to the barrel axis for firing subsequent barrels F41A19/24Release-trigger mechanisms, i.e. the striker element being released during the return movement of the trigger subsequent to trigger pull F41A19/25having only slidably-mounted striker elements, i.e. percussion or firing pins F41A19/26the percussion or firing pin and the breech-block or bolt forming one piece F41A19/34 takes precedence F41A19/27the percussion or firing pin being movable relative to the breech-block F41A19/28propelled by a cam or lever when the breech-block or bolt arrives in a closing position F41A19/29propelled by a spring under tension F41A19/30in bolt-action guns F41A19/31Sear arrangements therefor F41A19/33 takes precedence F41A19/32for catching the percussion or firing pin after each shot, i.e. in single-shot or semi-automatic firing mode F41A19/33Arrangements for the selection of automatic or semi-automatic fire F41A19/34Cocking mechanisms F41A19/35Double-action mechanisms, i.e. the cocking being effected during the first part of the trigger pull movement F41A19/36in block-action guns F41A19/37Cocking mechanisms F41A19/38Double-action mechanisms, i.e. the cocking being effected during the first part of the trigger pull movement F41A19/39Cocking or firing mechanisms for other types of guns, e.g. fixed breech-block types, forwardly-slidable barrel types F41A19/40Double-action mechanisms, i.e. the cocking being effected during the first part of the trigger pull movement F41A19/41for breakdown guns F41A19/42having at least one hammer F41A19/43in bolt-action guns F41A19/44Sear arrangements therefor F41A19/46 takes precedence F41A19/45for catching the hammer after each shot, i.e. in single-shot or semi-automatic firing mode F41A19/46Arrangements for the selection of automatic or semi-automatic fire F41A19/47Cocking mechanisms F41A19/48Double-action mechanisms, i.e. the cocking being effected during the first part of the trigger pull movement F41A19/49in block-action guns F41A19/50Cocking mechanisms F41A19/51Double-action mechanisms, i.e. the cocking being effected during the first part of the trigger pull movement F41A19/52Cocking or firing mechanisms for other types of guns, e.g. fixed breech-block types, revolvers F41A19/53Double-action mechanisms, i.e. the cocking being effected during the first part of the trigger pull movement F41A19/54for breakdown guns F41A19/55Fluid-operated firing mechanisms F41A19/56Ignition of the propellant charge by contact with air heated by adiabatic compression F41A19/57Firing mechanisms operating with primer cartridge F41A19/58Electric firing mechanisms F41A17/10, F41A17/12 take precedence F41A19/59Electromechanical firing mechanisms, i.e. the mechanical striker element being propelled or released by electric means F41A19/60characterised by the means for generating electric energy F41A19/61Inductive generators F41A19/63 takes precedence F41A19/62Piezo-electric generators F41A19/63having means for contactless transmission of electric energy, e.g. by induction, by sparking gap F41A19/64for automatic or burst-firing mode F41A19/65for giving ripple fire, i.e. using electric sequencer switches for timed multiple-charge launching, e.g. for rocket launchers F41A19/66Electronic shot-velocity control F41A19/65 takes precedence F41A19/67Burst limiters F41A19/68for multibarrel guns or multibarrel rocket launchers or multicanistersF41A19/65 takes precedence F41A19/69Electric contacts or switches peculiar thereto F41A19/65 takes precedence F41A19/70Electric firing pinsMountings therefor F41A21/00BarrelsGun tubesMuzzle attachmentsBarrel mounting means F41A25/00 takes precedence; barrel attachments for firing grenades or riot-control ammunition from smallarms F41C27/06 F41A21/02Composite barrels, i.e. barrels having multiple layers, e.g. of different materials F41A21/04Barrel liners F41A21/06Plural barrels F41A21/08Barrel junctions F41A21/10Insert barrels, i.e. barrels for firing reduced calibre ammunition and being mounted within the normal barrels F41A21/12Cartridge chambersChamber liners F41A3/74, F41A9/46, F41A21/04 take precedence F41A21/14Arrangement of cartridge chambers lateral to the barrel axis F41A21/16Barrels or gun tubes characterised by the shape of the bore F41A21/18Grooves-Rifling F41A21/20Barrels or gun tubes characterised by the material F41A21/02 takes precedence F41A21/22Barrels which have undergone surface treatment, e.g. phosphating F41A21/44 takes precedence F41A21/24Barrels or gun tubes with fins or ribs, e.g. for cooling F41G1/42 takes precedence F41A21/26specially adapted for recoil reinforcement, e.g. for training purposes F41A21/28Gas-expansion chambersBarrels provided with gas-relieving ports F41A1/06, F41A13/08 and F41A21/36 take precedence F41A21/30Silencers F41A21/32Muzzle attachments or glands F41A21/26, F41A21/30, F41A21/46 take precedence ; for projectile velocity measurements G01P3/665, G01P3/685 F41A21/325Mountings for muzzle attachments F41A21/34Flash dampers F41A21/36for recoil reduction recoil reduction arrangements in general F41A25/00; Stabilisators; Compensators, e.g. for muzzle climb prevention F41A21/38adjustable , i.e. the vent holes or the vent area being adjustable F41A21/40Chokes for shotguns , e.g. automatic chokes F41A21/42manually adjustable F41A21/44Insulation jacketsProtective jackets F41A21/46Barrels having means for separating sabots from projectiles F41A21/48Barrel mounting means, e.g. releasable mountings for replaceable barrels F41A21/481using partial or interrupted threads, e.g. bayonet-type mountings F41A21/482using continuous threads on the barrel F41A21/484using interlocking means, e.g. by sliding pins F41A21/485using screws or bolts F41A21/487using friction, e.g. by clamping a barrel surface F41A21/488Mountings specially adapted for pistols or revolvers F41A23/00Gun mountings, e.g. on vehiclesDisposition of guns on vehicles F41A25/00, F41A27/00 take precedence F41A23/005Locks for connecting guns to their mountings F41A23/50 takes precedence F41A23/02Mountings without wheels Shooting stands for hunting A01M31/02 F41A23/04Unipods F41A23/06adjustable F41A23/08Bipods F41A23/10adjustable F41A23/12Tripods ; Mountings having at least three legs F41A23/14adjustable F41A23/16Testing mounts F41A23/18Rests for supporting smallarms in non-shooting position racks for storage A47B81/00; racks in vehicles B60R7/14 F41A23/20for disappearing guns F41A23/22on board of submarines F41A23/24Turret gun mountings feeding, loading or guiding ammunition F41A9/00; mechanical elevating or traversing systems for turret guns F41A27/18 F41A23/26Mountings for transport onlyLoading or unloading arrangements for guns for use with carrier vehicles F41A23/50 takes precedence F41A23/28Wheeled-gun mountingsEndless-track gun mountings F41A23/30the wheels being liftable from the ground for firing F41A23/32with split trails F41A23/30, F41A23/46 takes precedence F41A23/34on wheeled or endless-track vehicles F41A23/36on trailers F41A23/42 takes precedence F41A23/38on motorcycles F41A23/40on rail vehicles F41A23/42for rocket throwers F41A23/44on sledges F41A23/46Trail spades F41A23/48elastic F41A23/50Travelling locksBrakes for holding the gun platform in a fixed position during transport F41A23/52Base plates for gun mountings F41A23/54for mortars F41A23/56Arrangements for adjusting the gun platform in the vertical or horizontal position F41A17/10, F41A17/12 take precedence ; ground engaging vehicle fittings for lifting or supporting it B60S9/04; supports for mobile cranes B66C23/78 F41A23/58Hydraulic jacks F41A23/60Screw-operated jacks F41A25/00Gun mountings permitting recoil or return to battery, e.g. gun cradlesBarrel buffers or brakes recoilless guns F41A1/08 F41A25/02Fluid-operated systems F41A25/04adjustable , e.g. in relation to the elevation of the gun F41A25/06Friction-operated systems F41A25/08adjustable F41A25/10Spring-operated systems F41A25/12using coil springs F41A25/14adjustable F41A25/16Hybrid systems F41A25/18Hydroelastic systems F41A25/20Hydropneumatic systems F41A25/22Bearing arrangements for the reciprocating gun-mount or barrel movement F41A25/24using ball or roller bearings F41A25/26Assembling or dismounting recoil elements or systems F41A27/00Gun mountings permitting traversing or elevating movement, e.g. gun carriages F41A27/02Control systems for preventing interference between the moving gun and the adjacent structure F41A27/04Scatter-fire arrangements, i.e. means for oscillating guns automatically during firing F41A27/06Mechanical systems F41A27/02, F41A27/04, F41A27/30 take precedence F41A27/08Bearings, e.g. trunnionsBrakes or blocking arrangements F41A27/10Bearings for supporting a pivoting gun in a wall, e.g. a turret wall F41A27/12Brakes or locks for blocking traversing or elevating gear in a fixed position F41A27/14Central-pivot bearings F41A27/16using raceway bearings, e.g. for supporting the turret F41A27/18for gun turrets F41A27/08 takes precedence F41A27/20Drives for turret movements F41A27/22Traversing gear F41A27/18 takes precedence F41A27/24Elevating gear F41A27/18 takes precedence F41A27/26Fluid-operated systems F41A27/02, F41A27/04, F41A27/30 take precedence F41A27/28Electrically-operated systems F41A27/02, F41A27/04, F41A27/30 take precedence F41A27/30Stabilisation or compensation systems, e.g. compensating for barrel weight or wind force on the barrel F41A29/00Cleaning or lubricating arrangements injecting fluids into barrels or cartridge chambers F41A13/04 ; ammunition for cleaning purposes F42B5/24 F41A29/02Scrapers or cleaning rods F41A29/04Lubricating, oiling or greasing means, e.g. operating during use F41A31/00Testing arrangements testing mounts F41A23/16 F41A31/02for checking gun barrels F41A33/00Adaptations for training adaptations of barrels for recoil reinforcement F41A21/26Gun simulators teaching or practice apparatus for gun-aiming or gun-laying F41G3/26 ; shooting games A63F9/02; military simulation G09B9/003 F41A33/02Light- or radiation-emitting guns ; Light- or radiation-sensitive guns; Cartridges carrying light emitting sources, e.g. laser F41A33/04Acoustical simulation of gun fire, e.g. by pyrotechnic means F41A33/06Recoil simulators F41A35/00Accessories or details not otherwise provided for F41A35/02Dust- or weather-protection caps or covers protecting-caps for trigger guards F41A17/54 F41A35/04Muzzle covers F41A35/06Adaptation of guns to both right and left hand use F41A99/00Subject matter not provided for in other groups of this subclass