Description

The SIG Sauer MCX-SPEAR is a modern multi-caliber rifle derived from the SIG MCX platform and developed for both military and civilian markets. It incorporates a short-stroke gas piston system with a rotating bolt, fully ambidextrous controls, and modular design features such as user-interchangeable barrels and stock options. Chambered for calibers like .277 SIG FURY (6.8×51 mm hybrid), 7.62×51 mm NATO, and 6.5 mm Creedmoor, the MCX-SPEAR blends tactical versatility, durability, and next-generation performance in a lightweight, adaptable package.

Specifications

• Manufacturer: SIG Sauer
• Model: MCX-SPEAR (civilian version of the XM7/NGSW rifle)
• Caliber Options:
  • .277 SIG FURY (6.8×51 mm hybrid)
  • 7.62×51 mm NATO
  • 6.5 mm Creedmoor
• Action: Semi-automatic short-stroke gas piston with rotating bolt
• Operating System: Adjustable gas piston (suppressed/unsuppressed)
• Barrel Length (Typical): ~16″
• Twist Rate: ~1:10″ (varies by caliber)
• Stock: 6-position folding/telescoping stock (Magpul SL-M style)
• Handguard: Free-float M-LOK™ handguard with full-length Picatinny rail
• Controls: Fully ambidextrous (safety, bolt catch, magazine release)
• Charging Handles: Non-reciprocating rear and side charging handles
• Trigger: 2-stage Matchlite Duo trigger
• Magazine Type: SR-25 pattern box magazine (20-round typical)
• Muzzle Device: Suppressor-ready with QD mount (varies by package)
• Ambidextrous Features: Yes — safety, bolt-catch, magazine release
• Modularity: Caliber conversion with interchangeable barrels and parts
• Overall Length : ~38.3″
• Weight: Approx. 8.9 lb (varies with configuration)
• Accessory Rail: Full-length Picatinny atop handguard and upper receiver

The MCX-SPEAR represents SIG Sauer’s next evolution of the MCX line, bringing a modular, ambidextrous, and multi-caliber capable platform to both civilian and defense users with features aimed at adaptability, durability, and performance across mission profiles.