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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.
A prototype of the MOE slot was revealed by Magpul in late 2007 together with their Masada Concept Rifle (which would later be known as the Adaptive Combat Rifle).Magpul released the MOE slot system in 2008 as a feature on their MOE handguards, and at the same time compatible accessories such as Picatinny rail sections, direct MOE mounted light mounts, grips, bipod studs, etc. were released.
The M&P15 Sport III was released in 2024. It features a free float handguard and mid length gas system, both not found on previous models. [19] The M&P15-22 is a blowback-operated, .22 Long Rifle version of the M&P15. It is made with a polymer upper and lower receiver. [20]
It is similar in concept to the earlier commercial Weaver rail mount used to mount telescopic sights, but is taller and has wider slots at regular intervals along the entire length. The MIL-STD-1913 locking slot width is 0.206 in (5.23 mm). The spacing of slot centres is 0.394 in (10.01 mm) and the slot depth is 0.118 in (3.00 mm). [8]
The AR-15 is nominally chambered in .223 Remington or 5.56×45mm NATO, with the .223 Wylde chamber allowing for the safe chambering of both, but many variants have been produced in different calibers such as .22 LR (sometimes referred to as an AR-22 [59]), 7.62×39mm, 9×19mm Parabellum, [60] 6.5mm Grendel, and shotgun calibers. [61]
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] In 2013 the scaled-down M&P22 Compact was released. The pistol also has a Picatinny rail. [2]
In 2012, Smith & Wesson introduced the M&P Shield in 9mm and .40 S&W. The Shield is a subcompact single-stack magazine variant of the M&P line. The Shield has roughly the same silhouette as the M&P Compact but is considerably thinner at less than 1-inch in width. The Shield is the first M&P to incorporate an improved trigger with positive reset ...
A further upgrade including the provision of Advanced Combat Optical Gunsights (ACOGs), a Daniel Defense-designed Picatinny rail (RIS) handguard for the L85 rifle (with optional Grip Pod downgrip), [39] and a new vortex style flash eliminator was introduced as an Urgent Operational Requirement; initially introduced for use by selected units in ...