Description

The Sig Sauer MCX Spear SBR is a semi-automatic short-barreled rifle chambered in 6.8x51mm with a 13″ threaded barrel and a coyote anodized receiver. It ships with a folding Magpul SL-M stock and a single 20-round steel AR-10 magazine. The platform features ambidextrous controls, an adjustable two-position gas system, and a Sig Two-Stage Matchlite Duo trigger to support consistent operation.

Key Specifications

• The rifle is chambered in 6.8x51mm.
• The barrel length is 13 inches and is described as threaded steel.
• The standard capacity is 20 + 1.
• The action type is Semi-Auto.
• The listed weight is 8.90 lbs (with magazine).
• The stock is a Magpul Push Button Folding SL-M design.
• The receiver finish is Coyote Anodized.
• The muzzle device is listed as SLH/SLX Suppressor Flash Hider with a 5/8×24 thread pattern.
• The reported twist rate is 1:7.
• The trigger is a Sig Two-Stage Matchlite Duo.

Engineered for modular performance and practical utility, the MCX Spear SBR combines compact dimensions with features that support adaptability and sustained operation. Its 6.8x51mm chambering, adjustable gas system, ambidextrous controls, and robust construction make it well suited for shooters who value a high-quality, compact platform with modern ergonomics and component-level durability.