SIG SAUER MCX SPEAR 6.8x51mm 13″ SBR 20rd

The SIG SAUER MCX SPEAR SBR is the civilian short-barreled rifle variant of the MCX-SPEAR platform, chambered in 6.8x51mm with a 13" threaded barrel. This configuration pairs a compact overall profile with ambidextrous controls and a folding Magpul SL-M stock for adaptable handling. The rifle ships with one 20‑round AR-10 style steel magazine and is configured with an M-LOK handguard and adjustable gas system.

Key Specifications

• Chambered in 6.8x51mm.
• Barrel length is 13" and the barrel is threaded.
• Includes 1 x 20-Round AR-10 style steel magazine.
• Action type is Semi-Auto.
• Stock is a Magpul Push Button Folding SL-M.
• Trigger is a Sig Two-Stage Matchlite Duo.
• Handguard features M-LOK attachment points.
• Receiver finish is Coyote Anodized.
• Weight is listed as 8.90 lbs with magazine.
• Rate of twist is 1:7.

Built to deliver modularity and compact handling, the MCX SPEAR SBR blends short-barrel maneuverability with the larger 6.8x51mm chambering and robust SIG Sauer construction. Its ambidextrous controls, M-LOK compatibility and folding stock make it suitable for users seeking a compact, high-capability platform for precision-oriented and utility roles where a shorter rifle length is required.