MCX SBR for Sale

Quick Look

The MCX SBR was developed by Sig Sauer to meet military and law enforcement needs for a modular, compact carbine. Designed around versatility, it features a short-stroke gas piston system and folding stock. Today, the MCX SBR targets elite users and NFA registry holders seeking top-tier performance in a compact platform.

Why It's a Top Choice

• Short-stroke gas piston system reduces fouling and heat transfer
• Folding stock for ultra-compact storage and transport
• Interchangeable barrels and calibers for mission flexibility
• Suppressor-ready out of the box with adjustable gas block
• Trusted by special operations and military units globally

Key Variants

MCX Spear LT SBR

Refined with a lightened handguard and ambi controls, ideal for advanced tactical use.

MCX Virtus SBR

Battle-proven reliability with modularity for a wide range of calibers and barrel options.

MCX Rattler SBR

Designed for ultra-concealment, with a 5.5-inch barrel and .300 BLK caliber for CQB.

Competitor Comparison Table

Best Use Cases

• Law enforcement or military applications
• Home or vehicle defense (NFA compliant)
• SBR-focused tactical competition
• Suppressor testing and CQB drills
• Advanced rifle collector interest

FAQs

What is an MCX SBR classified as?

It is classified as a short-barreled rifle per the NFA, requiring ATF registration and a tax stamp.

Can I change calibers on a MCX SBR?

Yes, the MCX series supports barrel and caliber swaps for .223, 5.56, and .300 BLK.

How does the MCX SBR compare to the AR-15 platform?

It uses a gas piston instead of direct impingement, runs cleaner, and offers better suppressor integration.