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20-round detachable SR-25 pattern box magazine [7] 25-round detachable SR-25 pattern box magazine [ 8 ] (optional) The XM7 , previously designated as the XM5 , is the U.S. Army variant of the SIG MCX Spear , a 6.8×51mm (.277 in) , gas-operated , magazine -fed assault rifle [ 1 ] designed by SIG Sauer for the Next Generation Squad Weapon ...
SR-25 pattern box magazine The SIG MCX-SPEAR [ 4 ] is a multi-caliber rifle developed by the American division of SIG Sauer from the SIG MCX series of carbines. The SIG MCX-SPEAR is primarily chambered in .277 SIG FURY but can be adapted to 7.62×51mm NATO and 6.5mm Creedmoor with a barrel change.
An SR-25, AR-10 or LR-308 pattern magazine is a type of detachable firearm magazine based on the original Armalite AR-10 "waffle" magazine design introduced in the late 1950s, used for .308 Winchester and 7.62×51mm NATO cartridges.
Another form of box magazine, sometimes referred to as a "quad-column", can hold a large amount of ammunition. It is wider than a standard box magazine, but retains the same length. Casket magazines can be found on the Suomi KP/-31, Hafdasa C-4, Spectre M4, QCW-05 and on 5.45×39mm AK rifle derivatives, and now the Kel-Tec CP33 as well.
Many non-U.S. and commercial magazines have been developed to effectively mitigate these shortcomings, e.g., H&K's all-stainless-steel magazine, Magpul's polymer P-MAG, etc. [163] [162] Production of the 30-round magazine started late 1967 but did not fully replace the 20-round magazine until the mid-1970s. [ 162 ]
On March 4, 1963, the Department of Defense's Advanced Research Projects Agency made the first purchase of the Stoner 63, ordering 25 units in various configurations. [9] In August and September 1963, the Stoner 63 was sent to the Marines Corps Landing Force Development Center at Quantico for evaluation, where it made a positive impression with its light weight and high ammunition capacity; [5 ...
The XM7 was designed to fire the 6.8×51mm SIG Fury cartridge in response to concerns that improvements in body armor would diminish the effectiveness of the 5.56×45mm NATO round used in the M4 carbine and M249 SAW and increase their lethality and effective ranges compared to common battlefield rounds such as the 5.56×45mm NATO and 7.62×51mm ...
10-, 20-, 30- or 35-round detachable box magazine, 50 round drum magazine The SIG MPX is a gas-operated submachine gun designed and manufactured by SIG Sauer , and is primarily chambered in 9×19mm Parabellum .