The Sig Sauer MPX 4.5″ Barrel is a standout in the submachine gun category, offering unparalleled operator safety, adaptability, and reliability. This 9mm powerhouse features a monolithic Elite Series Cerakote finish upper receiver, integrated stock knuckle lower, and a 4.5″ barrel with an integrated muzzle brake. Designed for versatility, it operates from a fully-closed and locked rotating bolt, ensuring enhanced safety and reliability in any environment.

Equipped with a short-stroke gas piston, the Sig Sauer MPX Copperhead K runs seamlessly with all weights and brands of 9mm ammunition, requiring no gas valve adjustments. The ambidextrous design includes dual-sided selector switches, magazine release, charging handle, and bolt release, making it ideal for both right and left-handed shooters.

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