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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.
Other cartridges were derived from re-forming an existing case and possibly trimming the length in order to arrive at a case-shape that meets the standardized SAAMI-spec dimensions. AR-15: 22 Nosler, Proprietary, uses the head and rim dimensions of the 5.56x45, and a case-body that is similar to the 6.8 SPC case. To increase powder capacity ...
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.
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A powder with a slower burning rate is used to make the most use of the length of a rifle barrel. Most .22 long rifle powders increase velocity up to about 19 in (480 mm) of the barrel. The powder used in the Stinger increases velocity up to the longest .22 barrel length tested by the NRA, 26 in (660 mm). [24]
An evolution of the M&P Shield, the M&P Shield Plus, among other improvements, utilizes a double-stack magazine to increase capacity at the sacrifice of a slight increase in width. In November 2021, Smith & Wesson introduced the M&P M2.0 chambered in 10mm Auto to the M&P M2.0 family. Smith & Wesson offers a 4.0 in (101.6 mm) barrel compact ...
15–5, 1986 Introduction of 6” and 8-3/8” barrel; 15–6, 1988 New yoke retention system/ radius stud package/hammer nose bushing; 15–6, 1988 Discontinue 8-3/8” and 2” barrel; 15–6, 1992 Discontinue 6” barrel, blue finish only; 15–7, 1994 Synthetic grips introduced, drill and tap frame, change rear seat leaf, change extractor