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In mid-1930s, Bofors designed several successful artillery pieces (e. g. 37-mm and 105-mm guns) with new perforated muzzle brakes, so-called pepper-pot muzzle brakes, a design invented by then Swedish artillery captain Harald Jentzen and therefore known in Sweden as a "Jentzen-brake" (Swedish: Jentzen-broms). [11]
Attaching the barrel to the receiver using a barrel nut and a barrel with a shoulder is an alternative to action threads, which has been used in firearms such as the Sten gun and AR-15. Hand tools Quick barrel change systems is an increasingly popular alternative, as seen in for example SIG Sauer 200 STR, Roessler Titan or Blaser R8.
There was a second belt-fed machine gun developed under the CAR-15 program called the CMG-1, CMG-2, and CMG-3 in 7.62 NATO that was not based on the existing AR-15/M16 design. However, the U.S. military only made significant purchases of the existing M16 rifle and the SMG model, later called the Commando versions, so Colt abandoned the CAR-15 ...
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A trap shooter shooting at distant targets traveling away from the gun might use 0.75 mm (0.030 in) of constriction to produce a 75 cm (30 in) diameter pattern at 35 m (38 yd). Special chokes for turkey hunting, which requires long range shots at the small head and neck of the bird, can go as high as 1.5 mm (0.059 in).
A disassembled Mauser action showing a partially disassembled receiver and bolt. In firearms terminology and law, the firearm frame or receiver is the part of a firearm which integrates other components by providing housing for internal action components such as the hammer, bolt or breechblock, firing pin and extractor, and has threaded interfaces for externally attaching ("receiving ...
A gun barrel is a crucial part of gun-type weapons such as small firearms, artillery pieces, and air guns. It is the straight shooting tube, usually made of rigid high-strength metal , through which a contained rapid expansion of high-pressure gas(es) is used to propel a projectile out of the front end ( muzzle ) at a high velocity.
A rail system mounted on top of a SIG SG 550 A dovetail rail on a rifle receiver for mounting a sight. A rail integration system (RIS; also called a rail accessory system (RAS), rail interface system, rail system, mount, base, gun rail, or simply a rail [1]) is a generic term for any standardized attachment system for mounting firearm accessories via bar-like straight brackets (i.e. "rails ...