The Sig Sauer MCX Spear is the civilian variant of Sig’s submission to the U.S. Army Next Generation Squad Weapon program, configured for 7.62x51mm NATO. It pairs a 16-inch barrel with a free-float M-LOK handguard and folding coyote stock for a balance of maneuverability and modularity. Controls are fully ambidextrous and the rifle includes a 2-position adjustable gas valve for suppressed or unsuppressed operation.
Key Specifications
- Chambered in 7.62x51mm NATO (.308 Win).
- Barrel measures 16 inches for a compact, rifle-length profile.
- Operates as a Semi-Automatic action.
- Barrel twist is 1:10″.
- Weight is approximately 9.2 lb with magazine.
- Equipped with a 6-position folding stock in coyote finish.
- Handguard is a M-LOK free-float design for accessory mounting.
- Muzzle uses a QD flash hider with 5/8-24 tpi thread pattern.
- Includes a 2-position adjustable gas valve for suppressed/unsuppressed use.
- Ships with one 20-round magazine.
The MCX Spear is built as a modern, adaptable platform for shooters who need a robust 7.62x51mm option with user-focused controls and accessory flexibility. Its combination of a free-float M-LOK handguard, ambidextrous controls and a folding, multi-position stock make it suitable for precision work and a broad range of field and range tasks.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.
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