Sig Sauer MCX Spear-LT RMCX-762R-16B-LT | 7.62×39 | 16″

The SIG SAUER MCX SPEAR LT is a 7.62x39mm modern sporting rifle built on the MCX platform with a 16-inch carbon steel barrel and a folding Sig MCX stock finished in coyote anodize. The design emphasizes modularity and user-focused controls, including fully ambidextrous manual safety and ambidextrous bolt catch/release. The rifle ships with a lightweight 13-inch M-LOK handguard and a SIG Flatblade Match trigger for a balance of control and accuracy.

For an optic under $1,000 that pairs well with this platform and caliber, consider a 1-8x variable low-power optic such as the Vortex Strike Eagle 1-8×24 for fast target acquisition at short to intermediate ranges while retaining precision out to longer distances.

Product Specifications

• The UPC is 798681660889.
• The manufacturer is Sig Sauer.
• The model is MCX Spear-LT.
• The caliber is 7.62 x 39 mm.
• The barrel measures 16 inches.
• The barrel material is carbon steel.
• The handguard is a 13-inch lightweight M-LOK free-float design.
• The action type is semi-automatic.
• The trigger is a SIG Flatblade Match trigger.
• The stock type is a folding (Sig MCX Folding) stock.
• The finish color is Coyote / Anodized.
• The thread pattern is 5/8″-24 tpi.
• The operating system is gas piston.
• The accessory rail type is M-LOK.
• The rifle includes 1 x 28-round magazine.

The MCX SPEAR LT delivers SIG’s modular approach to a larger-caliber platform: it blends a lightweight handguard and a match-style trigger with ambidextrous controls and a folding stock to support a range of field roles from recreational precision shooting to patrol-style carbine use. Its threaded muzzle and QD suppressor-ready flash hider make it adaptable for additional muzzle devices and accessories, and the M-LOK handguard provides solid options for mounting lights, grips, and other mission-specific gear.