Description
The Shop SIG MPX K is a premium, compact conversion kit for the SIG MPX platform, engineered by SIG Sauer. This kit transforms your MPX into a highly maneuverable, short-barreled configuration ideal for close-quarters use. It features a durable 4.5-inch cold hammer-forged barrel with a 1:10 twist rate, a hard-coat anodized aluminum handguard, and a factory-installed trilug muzzle device for suppressor compatibility.
Key Features
- 4.5-inch cold hammer-forged chrome-lined barrel for enhanced durability and accuracy.
- Hard-coat anodized M-LOK aluminum handguard provides a lightweight, rigid mounting platform.
- Factory-installed trilug adapter for quick-attach suppressor use.
- Maintains full compatibility with standard SIG MPX bolts, triggers, and lower receivers.
- Compact design drastically improves weapon handling and maneuverability in tight spaces.
Specifications
| Caliber / Type | 9x19mm Parabellum / SBR/PDW Conversion Kit |
|---|---|
| Material | Chrome-lined Steel Barrel, Aluminum Handguard |
| Finish | Hard-Coat Anodized (Handguard), Nitride (Barrel) |
| Compatibility | SIG MPX & MPX-K Generation 1 & 2 Models |
| Weight | Approx. 2.1 lbs (kit components) |
The MPX K’s 4.5-inch barrel with a 1:10 twist rate is optimized for stabilizing common 9mm defensive and target ammunition, including heavier 147-grain loads. This configuration leverages the MPX’s proprietary short-stroke gas piston system, which runs cleaner and cooler than direct blowback designs, ensuring reliable cycling with a wide range of pressures. It is a purpose-built tool for professional and tactical applications.




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