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Glock 47: The Glock 47 is a full-sized handgun created for the U.S. Customs and Border Protection, who wanted a version of the Glock 17 that has full parts compatibility with a Glock 19, saving for the slide and barrel. This means that the G47 slide and barrel can be put on a G19 frame to give the G19 a longer slide, barrel, and sight radius ...
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.
Conventional eight groove rifling on the left, and octagonal polygonal rifling on the right. Polygonal rifling (/ p ə ˈ l ɪ ɡ ə n əl / pə-LIG-ə-nəl) is a type of gun barrel rifling where the traditional sharp-edged "lands and grooves" are replaced by less pronounced "hills and valleys", so the barrel bore has a polygonal (usually hexagonal or octagonal) cross-sectional profile.
Rifling of a 105 mm Royal Ordnance L7 tank gun Conventional rifling of a 90 mm M75 cannon (production year 1891, Austria-Hungary) Rifling in a GAU-8 autocannon. Rifling is the term for helical grooves machined into the internal surface of a firearms's barrel for imparting a spin to a projectile to improve its aerodynamic stability and accuracy.
G42, G-42 or G.42 may refer to: HMS Lincoln (G42), a United Kingdom Royal Navy destroyer; SMS G42, an Imperial German Navy torpedo boat; G42 Shanghai–Chengdu Expressway in China; Victorian Railways G class locomotive number; Glock 42 pistol; G42 (company), an Emirati artificial intelligence company
Right: Threaded barrel without choke insert. (For illustration only; a threaded barrel must never be fired without a properly inserted choke tube.) The marking is usually stamped on the underside of the barrel for older guns without choke tubes, or is spelled out in abbreviated text on the barrel near the gauge marking.
The photograph showing four handgun barrels illustrates the evolution of handgun locked breech systems in four of the most famous firearms. This is from the Browning Hi-Power (I in the photograph), John Browning's last design. The second barrel is of the same action type in the CZ 75 handgun. The third barrel type is from an HK USP pistol.
The origin of the term is not clearly known and is the subject of much debate. In the past, the names of certain military weapons used the phrase, such as the Rifleman's Assault Weapon, a grenade launcher developed in 1977 for use with the M16 assault rifle, [20] or the Shoulder-launched Multipurpose Assault Weapon, a rocket launcher introduced in 1984.
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