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A worker at Lake City Army Ammunition Plant packs two cans of newly manufactured 5.56×45mm NATO ammunition into a wirebound crate. (c. 1998) Headstamp of a .50 caliber cartridge casing made at the Lake City Army Ammunition Plant in 1943 and recovered from the Sahuarita Bombing and Gunnery Range in 2012.
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It appears that this round can drastically improve the performance of any AR-15 weapon chambered to .223/5.56 mm. Superior accuracy, wounding capacity, stopping power and range have made this the preferred round of many special forces operators, and highly desirable as a replacement for the older, Belgian-designed 5.56×45mm SS109/M855 NATO round.
Early ammunition had a 4-digit year with the first 2 digits (thousands and hundreds) at 9 o'clock and the second 2 digits (tens and ones) at 3 o'clock. Ammunition with an E at the 12 o'clock position (which stands for Ersättning, or "Substitute") have a bimetallic cartridge-case (brass-clad steel) due to wartime economy measures during World ...
In 1968 Günter Frères developed the parent case, the rimmed 5.6×50mmR Magnum (designated 5,6 x 50 R Mag. by the C.I.P. According to the official C.I.P ruling, the rimless 5.6×50mm Magnum can handle up to 380.00 MPa (55,114 psi) P max piezo pressure, which is 40.00 MPa (5,802 psi) more than the rimmed parent case developed four years prior.
The Twin Cities Army Ammunition Plant was a United States Army ammunition plant located in Ramsey County, Minnesota in the current boundaries of the suburbs of Arden Hills and New Brighton, bounded by County Road I to the north, I-35W to the west, U.S. Route 10 to the southwest, County Highway 96 to the south, and Lexington Avenue to the east.
Cross section of external-propellant caseless ammunition, type 4.92 × 34 mm Heckler & Koch 4.73 × 33 mm Heckler & Koch, external-propellant caseless ammunition disassembled. The components are, from left to right: the solid propellant, the primer, the bullet, and a plastic cap that serves to keep the bullet centered in the propellant block.
War Department Supply Manual ORD-11 SNL Group T (Small Arms Ammunition) Department of the Army Supply Bulletin SB 9-AMM5 Ammunition Identification Code (AIC) Department of the Army Supply Manual SM 9-5-1305, Stock List of Current Issue Items, Ammunition and Explosives, AMMUNITION – THROUGH 30 MILLIMETER, Federal Supply Class 1305, April 1958.