Smith & Wesson agreement, Walther produced the frames, and Smith & Wesson produced the slide and barrel. The pistol has several cosmetic differences from the original Walther design and strongly resembles a hybrid between the P99 and the Sigma series. In 2005, Smith & Wesson debuted a new polymer-frame pistol intended for the law enforcement market. Dubbed the M&P (for Military and Police), its name was meant to evoke S&W's history as the firearm of choice for law enforcement agencies through its previous lineup of M&P revolvers. The M&P is a completely new design with no parts interchangeable with any other pistol including
Smith & Wesson debuted in two varieties: the M&P15 and the M&P15T. The two are basically the same rifle, chambered in 5.56 NATO, with the T model featuring folding sights and a four-sided accessories rail. These rifles were first produced by Stag Arms but marketed under the Smith & Wesson name. Currently Smith & Wesson makes the lower receiver in-house while the barrel is supplied by Thompson/Center, a S&W company. In May 2008, Smith & Wesson introduced its first AR-variant rifle in a caliber other than 5.56 NATO. The M&P15R is a standard AR-15 rifle chambered for the 5.45×39mm cartridge. In 2009, it