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Sig Sauer MPX K 9mm 30rd 4.5" Semi-Automatic Pistol MPX-K-9-KM-PSB

SKU: 175389123  |

Availability: Sold Out

MSRP: $2,162.00
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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.


  • Telescoping 3-Position Pistol Stabilizing Brace
  • Short Aluminum KeyMod Handguard with Handstop
  • Ambidextrous AR-style Controls
  • 1:10 Twist Rate


SKU 175389123
UPC 798681563487
Brand Sig Sauer
Model Name SIG MPX K PSB
Caliber 9mm
Class Full-size
Action Semi-Automatic
Capacity 30+1
Barrel Length 4.5"
Length 22.5"
Weight 6.2 lbs.
Sights -
Grip Standard
Trigger MIL-SPEC
Safety Ambidextrous
Finish Black Anodized
Condition New in Box
Color No
Price $1,799.97


It is a very well built firearm. It's a Sig what else can I say!!! Review by hribik
I took it out and shot it last week. I put a Romeo 5xdr red dot sight and some backup iron sights on it also. I like the gun a lot and it was very fun to shoot and I had no issues with it at all. All I have to say is when you go to shoot it make sure you take plenty of ammo with you because you will have a blast shooting it. (Posted on 10/16/2019)


Please see manufacturer website for warranty information.

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