Sig Sauer Mcx 300Blk 9 Sbr Blk Fold 30Rd Off Duty

The Sig Sauer MCX in 300 Blackout is a short-barreled rifle built for professionals who need a compact, hard-hitting platform. With a 9-inch barrel and folding stock, this 300 Blackout SBR trades nothing in capability for its reduced footprint—ideal for close-quarters work, vehicle operations, or tight spaces where a full-length rifle just won't fit. The MCX platform is known for its reliability and modularity, and chambered in 300 Blackout, it delivers serious stopping power in a package that handles like an oversized pistol. The 30-round magazine capacity keeps you in the fight, and the folding design means you can stow it fast when mobility matters.

This is purpose-built hardware for those who understand the relationship between tool and mission. The MCX 300 Blackout SBR has earned its reputation in professional hands precisely because it does what it promises without excuses. If you run suppressors (and many do with 300 Blackout), the short barrel and subsonic-friendly cartridge are a natural pairing. If you don't, you've still got a rifle that's compact enough to manage in tight quarters and powerful enough to be your only gun when it counts.

Sig's OFF-DUTY program extends exclusive pricing and support to qualified professionals—because those who protect and serve our communities deserve access to top-tier equipment without compromise.

Key Features

• 9-inch barrel for compact, maneuverable profile
• 300 Blackout chambering—proven subsonic and supersonic performance
• Folding stock reduces overall length for vehicle, bag, or confined-space carry
• 30-round magazine capacity
• Sig Sauer MCX platform known for reliability and ease of customization
• Professional-grade ergonomics and controls

Specifications

Frequently Asked Questions

What is the MCX 300 Blackout SBR best used for?

This rifle excels in scenarios requiring a compact, powerful platform—close-quarters work, vehicle operations, home defense, or any situation where a full-length rifle is impractical. The 300 Blackout cartridge and 9-inch barrel are particularly suited to suppressed operation, though it performs excellently unsuppressed as well.

Does the folding stock work with body armor or tactical gear?

The folding design is specifically engineered to reduce overall length for stowage and deployment in tight spaces, making it compatible with vehicle mounting, bag carry, and operations where a compact profile is essential. When deployed, the stock functions like any traditional rifle stock.

What is the Sig Sauer OFF-DUTY program?

OFF-DUTY is Sig Sauer's professional program providing exclusive pricing and access to firearms and equipment for qualified American professionals—law enforcement, military, first responders, and other service-oriented roles.

Is this a Title II registered short-barreled rifle?

Yes, this is an SBR (short-barreled rifle) as noted in the product classification. Ownership and transfer of SBRs are regulated under the National Firearms Act (NFA) and require proper federal registration and compliance with all applicable federal, state, and local laws. Buyers are responsible for understanding and following all legal requirements in their jurisdiction before purchase.