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Two 30 round AR-15 magazines coupled together, for example, is often a cheaper and more reliable alterative to a 60-round drum magazine, especially for applications such as home defense. However, jungle style magazines can often be impractical as it exposes the rounds and feed lips to foreign objects like mud and dirt which can cause malfunctions.
Government-specified barrel profile increased to between 0.675 and 0.575 inches; A2: Also referred to as the "government" or "gov't" profile. Barrel profile for which the portion of the barrel in front of handguards is thickened to 0.715 inches; HBAR: A barrel that in some portion is thicker than government-profile, usually underneath the ...
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.
Magpul has been granted a patent [47] for a STANAG-compatible casket magazine, [48] and such a magazine was also debuted by SureFire in December 2010, and is now sold as the MAG5-60 and MAG5-100 high capacity magazine (HCM) in 60 and 100 round capacities, respectively, in 5.56mm for AR-15 compatible with M4/M16/AR-15 variants and other firearms ...
The Colt AR-15 is a product line of magazine-fed, gas-operated, autoloading rifle manufactured by Colt's Manufacturing Company ("Colt") in many configurations. [1] The rifle is a derivative of its predecessor, the lightweight ArmaLite AR-15, an automatic rifle designed by Eugene Stoner and other engineers at ArmaLite in 1956.
Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. Locking lug feed ramp on AR-15 barrel nut. A feed ramp is a basic feature of many breech loading cartridge firearm designs. It is a tightly machined and polished piece of metal which guides a cartridge from the top of the magazine into the firing chamber of the barrel.
At this point, the bureaucratic battle lines were well-defined, with the Army ordnance agencies opposed to the AR-15 and the Air Force and civilian leadership of the Defense Department in favor. [27] In January 1963, Secretary of Defense Robert McNamara concluded that the AR-15 was the superior weapon system and ordered a halt to M14 production ...
Any AR-15/AR-10 cartridge cases that are derived from the 7.62x51 can also be formed from these listed calibers. (7.62x51 & .308 are similar in external dimensions though the Brass has different internal capacity and Max PSI recommendations are different & Chambers are different.) AR-10 :The AR-10 is slightly larger and heavier than the AR-15 ...