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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 rifle has different models that come chambered in 5.56mm NATO/.223 Remington, .22 Long Rifle, and 5.45×39mm. The barrels come with either a melonite lined or chrome-lined 4140 steel rifling, and 7075 T6 aluminum receiver with a hard-coat black anodized finish.
The Smith & Wesson M&P22 is a semi-automatic pistol chambered in .22 Long Rifle. It is hammer-fired and blowback-operated, and differs from the centerfire M&P variants, which are striker-fired and recoil-operated. The M&P22 has a single dot on the front sight and notch rear that is adjustable for elevation and windage. [1]
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 .
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15–2, 1964 Introduce 2” heavy barrel; 15–3, 1967 Relocation of rear sight leaf screw; 15–3, 1968 Delete diamond grips; 15–4, 1977 Change to put gas ring from yoke to cylinder; pinned barrel eliminated; 15–5, 1982; 15–5, 1986 Introduction of 6” and 8-3/8” barrel; 15–6, 1988 New yoke retention system/ radius stud package ...
.22 Nosler, a cartridge introduced in 2017 intended for use in AR-15-style rifles.22 PPC, a firearm cartridge used primarily in benchrest shooting.22 Remington Jet, a cartridge designed for the Smith & Wesson Model 53 revolver.22 Savage Hi-Power (5.6×52mmR), a cartridge introduced by Savage in 1912 for use in the Savage Model 99 rifle
Bushmaster also produces the Patrolman's Carbine variant which features the more common removable "bird cage" flash suppressor, attached to a 16 in (410 mm) barrel, bringing the total barrel length to 17.5 in (440 mm). Both of these comply with current U.S. federal law which states a minimum 16 in (410 mm) barrel for a rifle. There is also a ...