The MPX operates through a scaled down short-stroke gas piston adapted for use with pistol-caliber cartridges. The use of a fully closed and locked rotating bolt is another performance enhancement.

SIG SAUER just released the enhanced MPX Pistol Caliber Carbine (PCC), redesigned and upgraded for performance shooting sports, and to fulfill the needs of competitive and professional shooters alike.

Sig Sauer made a special-edition MPX carbine for the next John Wick blockbuster movie. (Photo by Ian D'Costa and Alan Lessig) Everybody’s favorite long-haired bearded badass, John Wick, will be ...