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SIG Sauer MPX-P PSB KM Handgun

Item # 975944
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Additional Information:

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  • To buy online and deliver to a Gander Mountain store or an Independent Firearms Dealer, simply add this item to your cart. Click here for additional details.
  • Firearms shipping charge of $25.00 per item.
  • You must be at least 21 years old to purchase this item. State and local laws may vary.


  • Short-Stroke Gas Piston System

  • Interchangeable Configuration System

  • KeyMod Aluminum Railed Forearm

  • Adjustable Flip-Up Battle Sights

  • SB15 Stabilizing Brace

Product Summary

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 SB15 Stabilizing Brace provides improved accuracy and reduced recoil for pistol models. The unique design uses the forearm to provide a natural and comfortable rest for shooters of all sizes and physical ability. This model features a KeyMod aluminum handguard for mounting accessories. The barrel, stock, and handguard are all interchangeable for quick configuration changes with a bevvy of options available.

Type Handgun
Action Semi-Auto
Caliber 9MM Luger
Barrel Length 8"
Weight 6.1 Lbs.
Sights Flip-Up Post/Flip-Up Adj.
Finish Black Steel/Anodized Aluminum
Grips Synthetic
Safety Ambidextrous Thumb
Capacity 1 x 30-Round Magazine