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 returned to his native Springfield, Massachusetts, while Wesson stayed on as plant manager with Volcanic Repeating Arms. As Samuel Colt's patent on the revolver was set to expire in 1856, Wesson began developing a prototype for a cartridge revolver. His research pointed out that a former Colt employee named Rollin White held the patent for a "Bored-through" cylinder, a component he would need for his invention. Wesson reconnected with Smith and the two partners approached White to manufacture a newly designed revolver-and-cartridge combination. Rather than make White a partner in their company, Smith and Wesson paid him a royalty of