FREE shipping on orders over $99 · 30-day returns
About · Blog · Contact
IA Iron River Armory

SIG Sauer MPX K Pistol 9mm 4.5 in PCB Brace

SKUTSW|108768 Conditionnew CategoryAR Pistols
$2225.77
✓ Free shipping over $99   ✓ Ships in 1–2 business days   ✓ 30-day returns

Specs at a glance

SIG Sauer MPX K Pistol 9mm … SPECS AT A GLANCE 5 lb WEIGHT 9mm SIZE
Editorial diagram — measurements verified during testing.

About this product

The SIG Sauer MPX K is a compact variant of the MPX platform chambered in 9mm with a 4.5 inch barrel. It employs a closed-bolt gas-piston operating system and ships with the SIG PCB folding brace that allows the pistol to fold into a compact configuration. The receiver finish is hard coat anodized aluminum and the barrel is cold hammer-forged carbon steel. A Timney single-stage trigger is fitted for a refined trigger feel suitable to experienced, no-nonsense shooters.

Key Specifications

  • The caliber is 9mm Luger.
  • The barrel measures 4.5 inches.
  • The action is a Semi-Auto gas-piston operating system.
  • The stock is a PCB (pivoting contour brace).
  • The barrel material is cold hammer forged carbon steel.
  • The trigger is a Timney single-stage.
  • The thread pattern is M13.5 x 1 mm.
  • The overall length is 22.25 in (565 mm).
  • The weight is 5 lb (2.3 kg).

Purpose-built for shooters who need a compact, modular 9mm platform, the MPX K combines a robust gas-piston system, durable construction, and an upgraded Timney trigger in a folding-brace configuration. Its compact footprint and proven MPX architecture make it a practical option for informed buyers seeking a high-quality, transportable pistol platform.

Related Videos:

Sources & methodology. Editorial review and rating by Travis Caldwell based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication.
$2225.77