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Common muzzle threads Diameter Pitch Comment Inch M12.7 0.907 mm Common on American rifles and pistols chambered for .223 Rem, .22 LR and 9×19mm. 1/2"-28 M12.7 1.270 mm Common on older European rifles chambered for .22 LR. 1/2"-20 M13.5 1 mm LH: Some European 9×19mm pistols 69/128"-25.4 LH: M14 1 mm Very common on European hunting rifles.
A muzzle brake or recoil compensator is a device connected to, or a feature integral (ported barrel) to the construction of, the muzzle or barrel of a firearm or cannon that is intended to redirect a portion of propellant gases to counter recoil and unwanted muzzle rise. [1] Barrels with an integral muzzle brake are often said to be ported.
However, the AK-47's heavier weight and slower rate of fire do a good job of mitigating any disadvantage. In addition, newer AK-47-type rifles use a muzzle brake or compensator to reduce recoil. [127] Some AK-type rifles also have vertical foregrips to improve handling characteristics and to counter the effects of recoil. [149] [150]
The rifles use stocks and extraordinarily thick Krieger barrels bearing an 18 lb (8.2 kg) muzzle brake. [1] Overall, depending on options, the rifles weigh from 85 to 120 pounds (39 to 54 kg) and are therefore only useful for shooting from a bench rest or heavy bipod. [2]
Barrels have been made in lengths of 6, 8 + 3 ⁄ 4, 10, 12, 14, 16, 21 and 24 inches (150, 220, 250, 300, 360, 410, 530 and 610 mm). [6] Heavier recoiling cartridge barrels have been made with integral muzzle brakes.
All current Weatherby Mark V rifles chambered for the .378 Weatherby Magnum and its derivatives are provided with the Accubrake as a standard accessory with the rifle package. The Accubrake reduces felt recoil by about 53%. [49] Unlike the earlier Pendleton muzzle brake, the Accubrake is a removable, screw-on type brake.
A choke is a tapered constriction of a firearm barrel at its muzzle end. Chokes are most commonly seen on shotguns, but are also used on some rifles, pistols, or even airguns. [1] Notably, some .22 LR match rifles have a constricted bore diameter near the muzzle. [citation needed]
While modern firearms are generally referred to by the name of the cartridge the gun is chambered for, they are still categorized together based on bore diameter. [citation needed] For example, a firearm might be described as a "30 caliber rifle", which could accommodate any of a wide range of cartridges using a roughly 0.30 inches (7.6 mm) projectile; or as a "22 rimfire", referring to any ...