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The DP-12 is a bullpup 12-gauge pump action double-barreled shotgun designed by Standard Manufacturing.It has two tube magazines, each of which feeds its own barrel.Each magazine tube can hold up to seven 2.75-inch (70 mm) 12-gauge shotshells or six 3-inch (76 mm) shotgun shells; [1] 16 (2 + 3 ⁄ 4") or 14 (3") in total with indicator windows.
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. In the case of choke tubes, the amount of choke for each barrel is usually stamped on the side of the choke tube, or there may be thin slots cut in the exposed rim of the ...
Military use of combat shotguns through the 20th century has created a need for ammunition maximizing the combat effectiveness of such weapons within the limitations of international law. 12-gauge has been widely accepted as an appropriate bore diameter to provide an effective number of projectiles within an acceptable recoil. Early 12-gauge ...
T3AUD = 240 Shells, Shotgun, 12 Gauge, No.8 Chilled Shot, Paper Cased, in 10-shell cartons. 12 cartons per M10 metal ammo can (120 shells). 2 × M10 ammo cans per M12 wooden crate. T3AWD = 360 Shells, Shotgun, 12 Gauge, No. 4 Chilled Shot, in 10-shell cartons, 12 cartons per M10 metal ammo can (120 shells). 3 × M10 ammo cans per M15 wooden crate.
A U.S. firearms manufacturer, Ameetec Arms LLC of Scottsdale, Arizona, started the manufacture of a USAS-12 semi-automatic clone in 2007, called the WM-12; it mainly differs from the USAS-12 by the lack of fixed sights and carrying handle, replaced by a Picatinny rail.
Model 520-30 trench gun barrels are marked "Proof Tested--12 Gauge --2 3/4 Inch Chamber--" on the left side and have another small "P" and ordnance bomb and the "J Stevens Arms Company" address on the right side of the barrel. This was done so that all the markings could be read with the heat shield installed.
The final bore is the FABARM choke system which consists of standard choking followed by a cylinder profile at the muzzle which serves to improve shot patterns and distribution. [3] The muzzle is threaded to accept one of five different chokes or a muzzle brake/compensator. Some models were sold with a ventilated barrel shroud.
Capacities of 2, 5, 7, 8, and 12 round box magazines are available, as well as ten, twelve, and twenty round aftermarket drum magazines. All magazines may be interchanged with all 12 gauge models (sometimes minor fitting may be necessary), although factory-original magazines from Russia only exist in 5, 7, and 8 round box configurations.