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Locked/Closed Rotating Bolt System
6.5" Barrel w/ 9.5" Permanent Muzzle Brake
Railed Aluminum KeyMod Handguard
Ambidextrous Safety Selector
30-Round 9mm Magazine
The SIG MPX redefines the submachine gun category with a new level of operator safety, in-field adaptability, and proven reliability in the harshest environments. The MPX features a fully locked and closed rotating bolt system, which provides maximum safety in case of bullet or water obstruction in the bore. SIG's short-stroke piston system reduces recoil and fouling. The bolt is held open on the last round fired. The monolithic upper receiver features an integral M1913 rail at 12 o'clock and a free-floating barrel. The MPX has a familiar, AR-style ambidextrous selector and magazine release, making the transition easy for users who've been shooting a traditional AR. The magwell is flared and beveled for easy reloading. The barrel, stock, and handguard are all interchangeable for quick configuration changes with a bevvy of options available. Rear charging handle. QD sling points. Telescoping stock.