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Part of the firearm action
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)
Breechblock
Method of reloading and firing a single-shot rifle
trapdoor is a form of breech-loading mechanism for rifles in which a hinged breechblock rotates up and forward, resembling the movement of a trapdoor. The Springfield
Trapdoor_mechanism
World's first military metallic-cartridge repeating rifle
1860. It uses a falling breechblock mounted in a carrier. Firing forces are contained by the receiver at the rear of the breechblock. Actuating the loading
Spencer_repeating_rifle
Semi-Automatic Pistol
a slot in the under-surface of the breechblock slide when the action is closed. To load the pistol, the breechblock is grasped on the serrated gripping
Mannlicher_M1901
Single-shot firearm action
with a specially shaped breechblock able to rotate on a pin. The breechblock is shaped like a section of a circle. The breechblock is locked into place by
Rolling_block
Machine gun
large enough diameter to also act as the lock for the breechblock. A striker inside each breechblock was cocked against a coil spring, then once the breech
Gardner_gun
Breechloading firearm action
breechloading firearm action, where the heavy breechblock tilted downwards across a bolt mounted in the rear of the breechblock, operated by a lever under the rifle
Peabody_action
Heavy machine gun
a closed bolt. When ready to fire, a round is in the chamber and the breechblock assembly and working parts are forward. It has a recoil operated, floating
Vickers_machine_gun
US service rifle from late 1800s
The Springfield Model 1873 was a trapdoor breechblock service rifle produced by the Springfield Armory for the United States military. It was the first
Springfield_model_1873
Whaling implement
horizontally sliding breechblock. To load, the rear cover plate would be rotated, exposing the back of the rectangular breechblock. The breechblock would be opened
Harpoon_cannon
Single-shot firearm action
solid metal breechblock slides vertically in grooves cut into the breech of the weapon and is actuated by a lever. When the breechblock is in the closed
Falling-block_action
Firearm component
breechface is the front part of the breechblock that makes contact with the cartridge in a firearm. The breech block (or breechblock) in a gun is what holds a round
Breechface
Cavity where a cartridge is inserted before being fired
The rear opening of the chamber is the breech, and is sealed by the breechblock or the bolt. The act of chambering a cartridge means the insertion of
Chamber_(firearms)
Part of the firing mechanism in a firearm
pierced (to contain propellant gases). It sits within a hole through the breechblock and is struck by the hammer when the trigger is "pulled". A light firing-pin
Firing_pin
Service rifle
developed such an action based on his original idea of the rear-pivoted breechblock, for use with Springfield and Enfield muzzle-loading muskets. The Peabody
Serbian_Peabody_rifle
Breech-loading rifle
The Springfield Model 1870 was a trapdoor breechblock service rifle produced by the Springfield Armory for the United States military. Introduced in 1870
Springfield_model_1870
Soviet 7.62×39mm assault rifle
gas-operated rifle with a short-stroke gas piston above the barrel, a breechblock mechanism similar to his 1944 carbine, and a curved 30-round magazine
AK-47
Mechanical part of a firearm
terms "breechblock" and "bolt" are often used interchangeably or without a clear distinction, though usually, a bolt is a type of breechblock that has
Bolt_(firearms)
Firearm that holds one round of ammunition
portion of the barrel was filed or milled away and replaced by a hinged breechblock which opened upward to permit loading. An internal angled firing pin
Single-shot
Mechanical device used to effect a closure using a partial rotation
partially threaded hole in the receptacle: threadless channels in the breechblock screw line up with the threaded parts of the receptacle, and vice versa
Interrupted_screw
19th-century English firearm
from the long lever on top of the action used to open and close the breechblock which looked like a monkey's tail when fully opened. In 1858 Westley
Westley_Richards_Monkey_Tail
Element of firearm design
movement of the projectile. Blowback This action relies on the inertia of a breechblock to delay breech opening until pressures have dropped to safe levels.
Locked_breech
Semi-automatic pistol
cocked and ready to repeat the process. The hinged locking piece assisted breechblock design provides good accuracy due to the in-line travel of the barrel
Walther_P38
Serbian infantry rifle of the late 19th century
adopted after 1865 used integral metallic cartridges and had hinged breechblock (Snider-Enfield, Krnka, Wänzl, Springfield Model 1873) or falling block
Green_percussion_rifle
Breech-loading rifle
and inserting a hinged breechblock fastened to the top of the barrel. A thumb-operated cam latch at the rear of the breechblock held it shut when in closed
Springfield_Model_1865
Battle rifle
200 Variants T48E1 HBAR Specifications Cartridge 7.62×51mm NATO Action Gas-operated, tilting breechblock Feed system 20-round detachable box magazine
T48_rifle
Single-shot pistol
rotating cylinder like a standard revolver, it featured a swiveling breechblock which allowed an individual round to be loaded and sealed into the frame
Ruger_Hawkeye
Breech-loading rifle
The Springfield Model 1888 was a trapdoor breechblock service rifle produced by the Springfield Armory for the United States military. Introduced in 1888
Springfield_Model_1888
French bolt-action rifle
metallic cartridge rifle. Modified in 1880 as the M80 with an improved breechblock and in 1914 as the M14 to accommodate the 8×50mmR Lebel smokeless powder
Fusil_Gras_mle_1874
Tank gun
M68. The T254E2/M68 used a vertical sliding breechblock instead of the T254E1's horizontal breechblock. Until American-made barrels could be obtained
M68_tank_gun
Breech-loading rifle
the initial pattern, the Mark I. The converted rifles received a new breechblock/receiver assembly, but retained the original iron barrel, furniture,
Snider–Enfield
British version of the Belgian FN FAL battle rifle
4 mm (21.83 in) Cartridge 7.62×51mm NATO Action Gas-operated, tilting breechblock Rate of fire 675-750 rounds/min (L2A1/C2) Muzzle velocity 823 m/s (2
L1A1_Self-Loading_Rifle
Breech-loading rifle
Springfield Model 1868 was one of the rifles which used the trapdoor breechblock design developed by Erskine S. Allin. Originally, the trapdoor Springfields
Springfield_Model_1868
Common long range firearm
Muzzle-loading rifle, some flintlock and mostly caplock Breech-loading rifle Breechblock rifle, either trapdoor, rolling, dropping, tilting or screwed Break-action
Rifle
Semi-automatic pistol
using a breechblock rather than a slide, though, since Browning had patented the idea of an auto pistol slide with an integral breechblock. They had
Davis_Warner_Infallible
Breech-loading rifle
Springfield Model 1884 was one of the rifles which used the trapdoor breechblock design developed by Erskine S. Allin. It was an improved replacement
Springfield_model_1884
Breech-loading rifle
1869 was a cadet rifle version of the Springfield Model 1868 trapdoor breechblock service rifle. Made by the Springfield Armory, it featured a shortened
Springfield_Model_1869
Functional mechanism of breech-loading
firearm actions invented. The dropping block are actions wherein the breechblock lowers or "drops" into the receiver to open the breech, usually actuated
Action_(firearms)
Breech-loading rifle
Springfield Model 1870 rifle. One of the rifles which used the trapdoor breechblock design developed by Erskine S. Allin. During the U.S. Civil War, Joseph
Springfield model 1870 Remington—Navy
Springfield_model_1870_Remington—Navy
Falling-block repeating rifle
made the breechblock – the part of the mechanism that seals the rear of the barrel – move back and down. The rearward movement of the breechblock automatically
Krag–Petersson
Revolver
rear sight to the rear of the barrel as opposed to the hammer or the breechblock of the earlier efforts. Chambered in .44 caliber, the gun was submitted
Colt_Model_1871–72_Open_Top
Firearm component that houses the operating parts of the weapon
providing housing for internal action components such as the hammer, bolt or breechblock, firing pin and extractor, and has threaded interfaces for externally
Receiver_(firearms)
Single-shot rifle
Farquharson-style hammerless falling-block action, where an underlever lowers the breechblock to expose the chamber and allow cartridge loading, and closing the lever
Ruger_No._1
Soviet-made field howitzer
interrupted-screw breechblock of the M1910/30. Since at that time Soviet industry had experienced major difficulties with manufacturing sliding breechblocks (as used
122_mm_howitzer_M1938_(M-30)
General-purpose machine gun
L) Cartridge 7.62×54mmR / 7.62×51mm NATO Action Gas-operated, tilting breechblock Rate of fire 700-800 rounds/min Muzzle velocity 830 m/s (2,723 ft/s)
UK_vz._59
Weapon
gun recoils 37 cm (15 in) in most applications. This breechblock design was based on the breechblock on the Krupp/Skoda sFH 18/43 model 18 that the British
Royal_Ordnance_L11
Type of firearm action
operation. In toggle-delayed blowback firearms, the rearward motion of the breechblock must overcome significant mechanical leverage. The bolt is hinged in
Blowback_(firearms)
Shotgun
sliding forearm or "pump action" to cycle the mechanism and a tilting breechblock. It was initially available in 20 gauge only (12 and 16 gauge guns were
Winchester_Model_1912
Firearm that can fire multiple times between reloads
long-recoil actions, such as the Browning Auto-5 shotgun, the barrel and breechblock remain locked for the full recoil travel, and separate on the return;
Repeating_rifle
Weapon
cartridge to eject. The MK 115 was a gas-operated, belt-fed weapon, and its breechblock used a swinging lock mechanism. It had a rifled barrel with an 8°30′
MK_115_cannon
Side-hinged lifting Breechblock
1867 Krnka Drawing of the M1867 Russian Krnka Type Side-hinged lifting Breechblock Place of origin Russia Service history In service 1869–1880 Wars Russo-Turkish
M1867_Russian_Krnka
Czechoslovak rifle
Cartridge 7.62×39mm Action Gas-operated, hinged locking piece assisted breechblock Rate of fire 800 rounds/min Muzzle velocity 705 m/s (2,313 ft/s) Muzzle
Vz._58
1968 Vietnam War military campaign
the tanks had been moved to another base two months earlier and the breechblocks of the artillery pieces had been removed, rendering them useless. One
Tet_Offensive
Type of semi-automatic pistol
Luger (98 series) Action Short recoil, hinged locking piece assisted breechblock Muzzle velocity 381 m/s (1,250 ft/s) Effective firing range 50 m (160 ft)
Beretta_92
Battle rifle
piston housed above the barrel, and the locking mechanism is tilting breechblock. To lock, it drops down into a solid shoulder of metal in the heavy receiver
FN_FAL
American second generation main battle tank
105 mm Gun, M68". It used a vertical drop breechblock instead of the T254E1's horizontal sliding breechblock. Until American-made barrels could be obtained
M60_tank
French-made weapon
sleeve. The F1 is fitted with a semi-automatic vertical sliding wedge breechblock, though fitted without a muzzle brake. Unlike the similar L7 tank gun
CN_105_F1
US WWII-era autocannon
level guide pins against cams to raise and lower the breechblock. The function of the breechblock was to assist in the final chambering of the round, close
M4_autocannon
Submachine gun
Suomi submachine gun of WW2. The design of the M45 is unusual as the breechblock is attached to a slide cover and not a charging handle. The slide cover
Madsen_M1945
Heavy gun-howitzer
The breechblock was of interrupted screw type, with forced extraction of cartridge during opening. A safety lock prevented opening of the breechblock before
152 mm howitzer-gun M1937 (ML-20)
152_mm_howitzer-gun_M1937_(ML-20)
Rolling-block rifle
split breech rifle lacked a hammer spur because it self-cocked when the breechblock was opened. Either 1864 or 1865, Remington Engineer Joseph Rider improved
Remington_Rolling_Block_rifle
Carbine
F. Garrett & Company Produced 1863-1864 No. built c. 400 Specifications Cartridge .52 bullet Caliber 0.52 in (13 mm) Action Side-hinged breechblock
Tarpley_carbine
Medium gun
recommended making a new calibre of 5.5 inches. The Asbury interrupted screw breechblock initially featured a semi-automatic firing mechanism used on naval guns
BL_5.5-inch_medium_gun
Lever-action rifle
stronger design. The action utilizes a toggle-joint system to lock the breechblock. The extension of the loading lever is the lower part of the toggle-joint;
Colt-Burgess_rifle
Heavy machine gun
the Maxim or Vickers are the principles of recoil operation, T-slot breechblock, "pull-out" belt feed, water cooling, and forward ejection. Its sliding-block
M1917_Browning_machine_gun
Main battle tank
of dust kicked up by firing. Its breech uses a horizontally sliding breechblock for loading the fixed cartridge cases. The loader is provided with a
Type_61_(tank)
Guns from Hotchkiss arms company
rifled, rapid-fire gun of oil-tempered steel, having a rectangular breechblock which moved in a mortise cut completely through the jacket. It was designed
Hotchkiss_gun
A floating breech is a breechblock of a firearm that is not held rigidly to the barrel at the moment of firing, but instead is free to move in the opposite
Floating_breech
Class of gun which is loaded from the breech
metallic cartridges and used a rotating bolt to open and close the breech. Breechblock Interrupted screw Rifled musket Rifled breechloader Greener, W. (2013)
Breechloader
American 155 mm self-propelled howitzer
West German army M109s were designated as the M109G, and featured a breechblock system developed by Rheinmetall extending the effective range to 18 kilometres
M109_howitzer
Gun for an individual
readily converted to fire fixed ammunition by replacing the barrel, bolt, breechblock, or any combination thereof. According to the U.S. ATF, if gas pressurization
Firearm
Single-shot rifle
two revisions during its production lifespan. At its introduction, the breechblock was actuated with a lever found on the side of the rifle, a system that
Stevens_Boys_Rifles
Tank gun
300 mm (208.66 in) (gun tube) Shell 120×570mm Calibre 120 mm (4.724 in) Breech semi-automatic vertical sliding-breechblock Recoil 304.8 mm (12.000 in)
M256_(tank_gun)
Breech-loading rifle
full cock position, retracted the breechblock spur to expose the chamber, and inserted the cartridge. When the breechblock closed, the hammer automatically
Springfield_model_1871
Rifle cartridge designed by the U.S. Army
conversion consisted of milling out the rear of the barrel for the trapdoor breechblock, and placing a .50 caliber "liner" barrel inside the .58 caliber barrel
.45-70
Semi-automatic rifle
62×45mm (vz. 52) 7.62×39mm (vz. 52/57) Action Gas-operated, tilting breechblock Rate of fire 25 rounds/min (practical) Muzzle velocity 760 m/s (2,493 ft/s)
Vz._52_rifle
Machine gun
Army. The VB, like the Bren light machine gun, used a locking tilting breechblock. Unlike the Bren, the VB locked its breech only at the last moment of
Vickers_K_machine_gun
Howitzer
longer than that of older designs, was fitted with an interrupted screw breechblock with recoil devices consisting of a hydraulic recoil buffer and hydro-pneumatic
152_mm_howitzer_M1938_(M-10)
Type of action found in self-loading handguns
empty cartridge case. Once the case has been ejected, the slide and breechblock that it contains have now moved past the area of the magazine. A spring
SIG_Sauer_system
Bolt-action rifle
Orville Robinson's straight-pull magazine rifle with a hinging wedge breechblock. In 1876 Mannlicher visited the Centennial Exposition to study firearms
Mannlicher_M1886
Shotgun
The linear hammer and its integral firing pin rotated within a fixed breechblock behind these barrels. The lock action was driven by a central coil spring
Winchester_Liberator
Single-shot rifle
is known as model 1868, or Berdan I. It is a hammerless "trapdoor" breechblock design, and was manufactured in limited numbers (the contract stipulated
Berdan_rifle
Externally powered, 12-barrel rifle-caliber rotary cannon
because it contained no major parts using a reciprocating motion, like the breechblock used in many other automatic weapons. Ignoring the various material stresses
Fokker-Leimberger
German 155 mm self-propelled howitzer
(JBMoU [de]-compatible / STANAG 4425 - AOP-29 part 1, NATO-standard) Breechblock Vertical sliding block breech mechanism Elevation -2.5° to +65° (-45
RCH_155
Rocket Propelled armour-piercing Grenade launcher
maximum effective range of 656 yards (600 m). The DARD 120 uses a split breechblock system. The weapon is made up of two parts, a disposable pre-loaded launch
Dard_120
Self-propelled anti-aircraft gun
four automatic cannons, 30 barrels, 16,000 rounds of ammunition and 45 breechblocks will be delivered as spare parts. These were purchased in order to ensure
Flakpanzer_Gepard
Breech-loading rifle
less significant changes. It employed a robust version of the trapdoor breechblock design originated by Erskine S. Allin, Master Armorer of the Springfield
Springfield_Model_1866
Towed field cannon
pressure with maximum charge in a new gun) 40,000 psi (275,790 kPa) Type of breechblock Interrupted screw Weight of breech mechanism 405 lb (184 kg) Type of
155_mm_gun_M1
Firearm component which guides the projectile during acceleration
reducing the available muzzle velocity. During the 19th century, effective breechblocks were invented that sealed a breechloader against the escape of propellant
Gun_barrel
Italian selective-fire automatic rifle
cylinder where the gases are tapped in, moving a piston connected to the breechblock. A recoil spring mounted in the piston closes the breech automatically
Cei-Rigotti
Breech-loading carbine
The Springfield Model 1886 was a trapdoor breechblock service rifle produced by the Springfield Armory for the United States military. It followed the
Springfield_Model_1886
Austrian firearms designer (1848 - 1904)
tubular magazines. In 1885-1886 he patented the "Mannlicher System" of a breechblock on a bolt-action basis, which was adopted as a service rifle by the Austro-Hungarian
Ferdinand_Mannlicher
well as some 155 mm NATO howitzers, such as the FH70, use sliding wedge breechblocks with obturating rings in order to fire their bagged ammo. "Reports on
Broadwell_ring
Armament of WWII battleship
powder case into the chamber. As the powder case cleared the top of the breechblock, the block would rise to seal the chamber. The gun was ready to fire
Armament of the Iowa-class battleship
Armament_of_the_Iowa-class_battleship
Light machine gun
62×45mm (vz. 52), 7.62×39mm (vz. 52/57) Action Gas-operated, tilting breechblock Rate of fire 900-1150 rounds/min Muzzle velocity 760 m/s Effective firing range
Vz._52_machine_gun
Breech-loading carbine
spot. The wrist itself was also thickened. Prior to 1877, the trapdoor breechblock had a high arch machined out of it, making it lighter. The Model 1877
Springfield_Model_1877
machine gun Fire support, suppression, defense Gas-operated, tilting breechblock Czechoslovakia Zbrojovka Brno, Military Technical Institute Kragujevac
List of German military equipment of World War II
List_of_German_military_equipment_of_World_War_II
Spanish light machine gun
Cartridge 7.92×57mm Mauser 7.62×51mm NATO Action Gas-operated, tilting breechblock Rate of fire 600-650 rounds/min Muzzle velocity 850 m/s (2,789 ft/s)
Fusil_ametrallador_Oviedo
1910 naval incident in Rio de Janeiro, Brazil
two Brazilian dreadnoughts were disarmed by the removal of their guns' breechblocks. The revolt and consequent state of the navy, which was essentially unable
Revolt_of_the_Lash
Field gun used by the Imperial Japanese Army
essentially utilized the Model 38 (improved) weapon with sliding-wedge type breechblock and hydro-pneumatic recoil mechanism on the split trail carriage used
Type_95_75_mm_field_gun
BREECHBLOCK
BREECHBLOCK
BREECHBLOCK
BREECHBLOCK
Biblical
thunder, or in vain
Girl/Female
African, Hindu, Indian, Sanskrit
First Root; Sun
Girl/Female
Arabic
First Lady
Boy/Male
Australian, Latin
Small
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Telugu
Dear; Cheerful; Deer
Boy/Male
Hebrew
Comfort.
Boy/Male
Finnish, Hebrew, Hindu, Indian
God is Gracious; Lord of Men
Male
Greek
(Καϊάφας) Greek form of Aramaic Qayyafa ("depression"), KAIAPHAS means "as comely." In the New Testament bible, this is the name of a high priest of the Jews.Â
Girl/Female
Muslim/Islamic
Hopes Aspirations, Wishes
Girl/Female
Spanish
Reference to the Virgin Mary.
BREECHBLOCK
BREECHBLOCK
BREECHBLOCK
BREECHBLOCK
BREECHBLOCK
n.
The movable piece which closes the breech of a breech-loading firearm, and resists the backward force of the discharge. It is withdrawn for the insertion of a cartridge, and closed again before the gun is fired.