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Breechblock

A breechblock (or breech block) is the part of the firearm action that closes the breech of a breech loading weapon (whether small arms or artillery) before or at the moment of firing. It seals the breech and contains the pressure generated by the ignited propellant. Retracting the breechblock allows the chamber to be loaded with a cartridge.

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Breechblock

Nodes114
Edges113
Triples142
Avg. degree1.98
Density0.017544
Components1

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Breechblock

Top relations

related to Rotating bolt · 20
Breechblock → AR-15, Enfield, In, It, Lee, Lee-Enfield Mk III, Mauser, More, Most, Multiple, Operation, Rotating, The, The Browning BLR, The Desert Eagle, There, This, TOZ-17, Usually, Winchester Model
related to Peabody-Martini · 15
Breechblock → Enfield, Firing, Henry, HenryThe Martini-Henry, Initially, It, Krag, Martini, Martini-Henry Mk, On, Peabody, Petersson, Section, The, The Krag
related to Sliding block · 15
Breechblock → Before, C64, Expanding, Figure, Firing, It, M101A1 HowitzerSection, No, Operation, Ordnance QF, Sharps, The, The Spencer, When, Winchester
related to Variants · 12
Breechblock → Another, Fokker Split Breech Rotary, It, Kalthoff, Kammerlader, Kentucky Military Treasures, Machine Gun, Mk, Mod, Perhaps, The British, US
related to Rotating drum · 11
Breechblock → Eagle, Holub, In, Instead, It, M1867 Werndl, Mating, Nordenfelt, Rotating, The, The Magnum Research Lone
related to Interrupted screw · 8
Breechblock → FN CAL, Henri-Pieper, Mk III, Perhaps, Ross, The, The Welin, Thompson Autorifle
related to Floating actions · 7
Breechblock → Browning Hi-Power, Colt's M1911, In, Most, The, This, When
related to Side-hinged breechblock · 7
Breechblock → Firing, Joslyn, Other, Snider-Enfield, Tarpley, The, Warner
related to Tilting block · 7
Breechblock → As, Bren, Firing, In, The, The FN Trombone, To
related to In-line · 6
Breechblock → Heckler, Koch, The, The Henry, This, Winchester

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Important terminology

breech bolt barrel locking rifle receiver action design closed mechanism rotating block lock rear used handle carrier similar uses slide

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Breechblockis aseparate component and is not a feature of the break-action0.90text
revolversinstance ofA breechblock must close against the rear of the breech for firing but be able to be retracted or otherwise moved for loading or unloading or to remove a spent cartridge.A breec…0.80text
harmonica gunsinstance ofA breechblock must close against the rear of the breech for firing but be able to be retracted or otherwise moved for loading or unloading or to remove a spent cartridge.A breec…0.80text
Kalthoff repeatersinstance ofA breechblock must close against the rear of the breech for firing but be able to be retracted or otherwise moved for loading or unloading or to remove a spent cartridge.A breec…0.80text
Kammerlader rifles orinstance ofA breechblock must close against the rear of the breech for firing but be able to be retracted or otherwise moved for loading or unloading or to remove a spent cartridge.A breec…0.80text
split breech designsinstance ofA breechblock must close against the rear of the breech for firing but be able to be retracted or otherwise moved for loading or unloading or to remove a spent cartridge.A breec…0.80text
the .22 cal rimfire seriesinstance ofThis type of locking is usually reserved for low-pressure applications0.80text
a caminstance ofThe rear of the breechblock tilts up into a recess to lock it closed.In-lineThe breech is opened by the breechblock moving in-line with the axis of the barrel and is locked in t…0.80text
wedgeinstance ofThe rear of the breechblock tilts up into a recess to lock it closed.In-lineThe breech is opened by the breechblock moving in-line with the axis of the barrel and is locked in t…0.80text
pawl or leversinstance ofThe rear of the breechblock tilts up into a recess to lock it closed.In-lineThe breech is opened by the breechblock moving in-line with the axis of the barrel and is locked in t…0.80text
the Walther P38.Flapper lockinginstance ofThis system was adapted to recoil operation by Bernhard Müller in his 1902 prototype pistol and has subsequently been used in other pistols0.80text
the Burnside carbineinstance ofcost was a factor for its limited acceptance.Ferguson RifleReversed chamberAn unusual reverse chamber has been used on firearms0.80text

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