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SIG MPX K PSB

The 4.5" MPX pistol variant combines with the telescoping 3-position brace

Features

Telescoping 3-Position Pistol Stabilizing Brace

Short Aluminum KeyMod Handguard with Handstop

Ambidextrous AR-style Controls

Specs

OPERATING SYSTEM
Gas Piston
CALIBER
9mm Luger
OVERALL LENGTH
22.5 in (571 mm)
OVERALL WIDTH
2.4 in (60 mm)
HEIGHT
8 in (203 mm)
BARREL LENGTH
4.5 in (114 mm)
WEIGHT
6.2 lbs (2.81 kg)
TWIST RATE
1:10
MAG TYPE
MPX

Details

Unconventional design, unmatched performance, and familiar AR handling. 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. Completely ambidextrous, the SIG MPX is great for left- or right-handed shooters with its dual-sided selector switch, magazine release, charging handle and bolt release. The SIG MPX operates from a fully-closed and locked rotating bolt, offering enhanced reliability and safety in use. A short-stroke gas piston allows the SIG MPX to run all weights and brands of 9mm ammunition with no adjustments to the gas valve. A full-length picatinny rail allows for solid, consistent mounting of optics and targeting lasers. The MPX K PSB features a 4.5" barrel, telescoping 3-position brace and a short aluminum KeyMod handguard with handstop.

Models

Browse by individual sku to find the right product for you.

Buy Now SKU MSRP CALIBER BARREL LENGTH MAGS INCLUDED MAG TYPE SIGHTS STATE COMPLIANT ACTION TYPE STOCK TYPE BARREL MATERIAL TRIGGER TYPE COLLAPSED/FOLDED LENGTH TRIGGER WEIGHT TWIST RATE FOREND TYPE GRIP TYPE RECEIVER FINISH OVERALL LENGTH OVERALL WIDTH HEIGHT THREADS ACCESSORY RAIL OPERATING SYSTEM WEIGHT
N/A MPX-K-9-KM-PSB $2,162.00 9mm Luger 4.5 in (114 mm) (1) 30rd Polymer Mag MPX Semi-Auto Telescoping 3 Position Brace Carbon Steel MIL-SPEC 5.5-9.0 lb (24-40 N) 1:10 Alloy Polymer Hard Coat Anodized 22.5 in (571 mm) 2.4 in (60 mm) 8 in (203 mm) M13.5 x 1 mm KeyMod Gas Piston 6.2 lbs (2.81 kg)

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