SIG SAUER MPX Carbine – 9mm, 16″ Barrel, Folding Stock, M-LOK Handguard, Black Finish, 30-Round
The SIG SAUER MPX RMPX-16B-9 is a premium semi-automatic pistol-caliber carbine (PCC) chambered in 9mm Luger, designed to provide the handling characteristics of a modern carbine with the reliability and smooth operation of SIG SAUER’s MPX platform. Featuring a 16-inch barrel, folding stock, M-LOK handguard, and compact AR-style ergonomics, the MPX Carbine is built for competition, training, and recreational shooting applications.
The MPX utilizes a closed, fully locked bolt system with a short-stroke gas piston operating system, offering consistent cycling and reduced fouling compared with traditional blowback-operated PCC designs. The platform features AR-style controls, ambidextrous controls, and a free-floating M-LOK handguard for accessory customization.
This configuration includes a 16-inch barrel, black synthetic grips, a folding/telescoping stock, aluminum M-LOK handguard, and a 30-round magazine. The longer barrel provides improved velocity and a traditional carbine profile while maintaining the compact handling characteristics that define the MPX family.
Specifications
| Feature | Specification |
|---|---|
| Manufacturer | SIG SAUER |
| Model | MPX Carbine |
| Model Number | RMPX-16B-9 |
| Caliber | 9mm Luger |
| Action | Semi-Automatic |
| Operating System | Closed Bolt, Short-Stroke Gas Piston |
| Barrel Length | 16 inches |
| Barrel Type | Cold Hammer Forged Barrel |
| Twist Rate | 1:10″ RH |
| Finish | Black |
| Receiver Material | Aluminum |
| Handguard | Free-Floating M-LOK Aluminum Handguard |
| Stock | Folding Stock |
| Grip | Black Synthetic Grip |
| Magazine Capacity | 30 Rounds |
| Magazine Type | SIG MPX Magazine |
| Trigger | Flat-Faced Trigger (configuration dependent) |
| Safety | Ambidextrous Safety Selector |
| Controls | Ambidextrous Controls |
| Optics Mount | Full-Length Picatinny Top Rail |
| Muzzle Thread | 13.5×1 LH (configuration dependent) |
| Overall Length | Approx. 35.5″ Extended |
| Weight | Approx. 7 lbs |
Key Features
- Chambered in 9mm Luger
- Full-length 16-inch barrel
- Advanced short-stroke piston system
- Closed bolt operating design
- Folding stock configuration
- Free-floating M-LOK handguard
- Full-length Picatinny optics rail
- Ambidextrous controls
- AR-style manual of arms
- Black finish with synthetic grips
- 30-round magazine capacity
- Designed for competition, training, and PCC applications
The SIG SAUER MPX 9mm Carbine combines the smooth operation of a piston-driven platform with the affordability and reduced recoil of the 9mm cartridge. Its folding stock, modular M-LOK handguard, and proven MPX operating system make it a highly adaptable pistol-caliber carbine for shooters looking for premium performance in a compact platform.
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