SIG SAUER MCX SPEAR 7.62×51 SBR – 13″ Barrel, Coyote, 20+1 | Factory Short Barrel Rifle

The SIG SAUER MCX SPEAR 7.62×51 SBR is the compact, hard-hitting variant of the rifle selected by the U.S. Army for the Next Generation Squad Weapon program (NGSW). Designed for unmatched durability, accuracy, and modularity, the MCX SPEAR brings a true battlefield-proven platform to civilian shooters in a 13-inch factory short-barrel configuration.

Built around SIG’s advanced short-stroke gas piston system, the MCX SPEAR provides smooth, reliable operation in all environments—even under suppressed conditions. The 13″ barrel offers a perfect balance of maneuverability and ballistic performance, making this SBR ideal for close- to mid-range engagements while still delivering the power of the 7.62×51 NATO cartridge.

The rifle features a fully ambidextrous control layout, including the safety selector, charging handle, and magazine release. The adjustable two-position gas valve allows shooters to fine-tune performance with or without a suppressor. Its rigid monolithic upper receiver and free-float M-LOK handguard enhance accuracy and reduce barrel flex under fire.

The MCX SPEAR SBR also includes SIG’s premium, adjustable, folding stock for compact storage and rapid deployment. Combined with its military-proven design, the SPEAR delivers one of the most advanced battle-rifle platforms available on the commercial market today.

Key Features

• Caliber: 7.62×51 NATO

• Barrel Length: 13″

• Action: Gas piston, semi-automatic

• Capacity: 20+1

• Gas System: Two-position adjustable for suppressed/unsuppressed use

• Handguard: M-LOK free-float rail

• Controls: Fully ambidextrous (charging handle, selector, mag release)

• Stock: Folding, adjustable position stock

• Finish: Coyote

• Bolt/Barrel Material: High-strength materials engineered for military use

• Overall Length: 25.1″–33.1″

• Weight: 6.8 lbs (w/ magazine)

Why the MCX SPEAR SBR Stands Out

• Built on the same platform chosen for the US Army’s NGSW program

• Superior recoil management and reliability

• High-pressure, long-life barrel and bolt designed for 7.62×51

• Military-grade ergonomics and durability

• Compact form factor without sacrificing ballistic performance

• Ideal for defensive use, battle-rifle roles, and tactical training

Ideal Uses

• Tactical and professional applications

• Short- and mid-range precision

• Duty or defensive rifle roles

• Enthusiast and collector-grade SBR platform

• Suppressor users seeking a piston-driven battle rifle

The SIG SAUER MCX SPEAR 7.62 SBR delivers next-generation performance in a compact package, making it one of the most elite factory-built SBRs available today.