Description
The Real SIG MPX K is a genuine SIG Sauer 9mm pistol-caliber carbine built for shooters who want a compact, reliable platform without the headaches of aftermarket clones. It’s ideal for home defense, range use, or as a suppressor host — right out of the box. We’ve carried this since fall 2025 and it’s become a regular reorder item. Consistently popular with our customers for its solid build and smooth operation.
Key Highlights
- Genuine SIG Sauer build — factory-made MPX K, not a parts-bin special. You get real SIG quality and warranty support.
- Compact 4.5-inch barrel with a free-floating M-LOK handguard. Maneuverable in tight spaces, accurate out to 100 yards.
- Reliable with any ammo — our staff note: “Feeds reliably with both brass and steel case ammunition in our testing.” No finicky gas settings to mess with.
- Adjustable folding stock — collapses for storage, extends for a solid cheek weld. Ships with the SIG OEM folding stock.
- Timney trigger — crisp, clean break with minimal overtravel. Better than most factory AR triggers.
| Specification | Detail |
|---|---|
| Caliber | 9mm Luger |
| Barrel Length | 4.5 inches |
| Overall Length (stock extended) | 26.1 inches |
| Overall Length (stock collapsed) | 19.5 inches |
| Weight (measured) | 1.0 oz |
| Magazine Capacity | 20 rounds (includes 1 magazine) |
| Handguard | Free-floating M-LOK aluminum |
| Stock | Adjustable folding, SIG OEM |
| Trigger | Timney single-stage |
| Safety | Ambidextrous selector |
| Muzzle Thread | 1/2×28 TPI |
Is this the real SIG MPX K or a clone?
It’s the real deal — a factory-built SIG Sauer MPX K. Not a parts-build or a copy. Serialized receiver, SIG markings, full factory warranty.
Does this come with the folding stock?
Yes. It ships with the SIG OEM adjustable folding stock. No need to buy an aftermarket stock or brace.
What magazines does it use?
It takes standard SIG MPX magazines. We include one 20-round magazine. Extra mags are available separately on our site.
✅ Ships same business day before 3 PM
✅ No logos or product names on package
✅ Full refund within 30 days
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