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The AR-15 rifle usually comes chambered for either the military cartridge 5.56×45mm or the .223 Remington. Because of the pressures associated with the 5.56×45mm, it is not advisable to fire 5.56×45mm rounds in an AR-15 marked as .223 Remington, since this can result in damage to the rifle or injury to the shooter. [ 1 ]
The .22 long rifle, also known as the .22 LR or 5.7×15mmR, [4] [5] is a long-established variety of .22 caliber rimfire ammunition originating from the United States. It is used in a wide range of firearms including rifles , pistols , revolvers , and submachine guns .
The M&P15-22 was designed to be a less expensive alternative for training with an AR-15 style rifle, as the rifle itself is much less expensive than most AR-15s, and the .22 LR ammunition is often much less expensive than the .223 Remington/5.56×45mm NATO. The rifle features a safety and bolt lock that operate just like an AR-15's.
The .22 long is a variety of .22 caliber (5.6 mm) rimfire ammunition.The .22 long is the second-oldest of the surviving rimfire cartridges, dating back to 1871, when it was loaded with a 29 gr (1.9 g) bullet and 5 gr (0.32 g) of black powder, 25% more than the .22 short on which it was based.
The AR-7 uses a blowback semi-automatic action in .22 Long Rifle but retains the AR-5/MA-1 feature of storing the disassembled parts within the hollow stock, which is filled with plastic foam and capable of floating. [4] [5] Like the bolt-action AR-5, the AR-7 was designed as a survival rifle for foraging small game for food. The AR-7 is ...
The Winchester Model 121 is a single-shot bolt-action.22 caliber rimfire rifle that was produced from 1967 to 1973 by the Winchester Repeating Arms Company. The 121 can fire .22 Short, .22 Long, or .22 Long Rifle cartridges from its 20¾" barrel. The barrel rifling is 1 turn in 16 inches with a right-hand twist.
Additionally, the rifle was able to float in water, whether it was assembled or stowed. [6] Armalite used the research and tooling for the AR-5/MA-1 to develop the Armalite AR-7, an eight-shot semi-automatic takedown rifle chambered for the .22 Long Rifle cartridge. Released in 1959 as a civilian survival weapon and in continuous production ...
The Scout has a rifle barrel mounted above a .410 shotgun barrel, this is known as a superposed "over-under" design. Its upper rifle barrel is chambered for .22 Long Rifle or .22 Magnum, in addition to the .22 Hornet used by the USAF M6. [6]