Sig Sauer MPX 9mm SBR, 8-Inch, Folding Stock (OFF-DUTY Exclusive)

The Sig Sauer MPX (brand part no. WRMPX-8B-9-SBR-35) is a 9mm short-barreled rifle built on Sig’s proven MPX platform, pairing an 8-inch barrel with a folding stock for a compact, PDW-style package. This configuration ships as part of Sig Sauer’s OFF-DUTY program, which offers exclusive pricing to qualified law enforcement, military, and public-safety professionals. Feeding from a high-capacity 35-round magazine, the MPX SBR favors professionals who want a compact, controllable 9mm platform.

Key Specifications

• Chambered in 9mm for a compact, controllable platform.
• Wears an 8-inch barrel for a short, maneuverable overall length.
• Feeds from a 35-round magazine for extended capacity.
• Built with a folding stock for compact storage and transport.

Frequently Asked Questions

Is this an NFA item? Yes. As a short-barreled rifle, it's a Title II firearm requiring an approved ATF Form 4 and transfer through an NFA-licensed dealer.

Who qualifies for OFF-DUTY pricing? Sig Sauer’s OFF-DUTY program is limited to verified law enforcement, military, and public-safety professionals.

What magazine does it use? It ships with a 35-round MPX magazine.

Buy the Sig Sauer MPX 9mm SBR (Professional Exclusive)

This is a Title II short-barreled rifle regulated under the National Firearms Act, and its OFF-DUTY pricing is restricted to eligible law enforcement, military, and public-safety professionals. Contact our Lubbock, Texas team to verify professional eligibility and walk through the NFA transfer process, which requires an approved ATF Form 4, no federal transfer tax, and transfer through a licensed NFA (SOT/Class 3) dealer. Browse Sig Sauer‘s short barrel rifles lineup for more options.