Sig Sauer MCX SPEAR-LT 5.56 NATO 16″ Folding Stock

The Sig Sauer MCX SPEAR-LT is a modular, lightweight evolution of the MCX platform designed for versatile field use. Chambered for 5.56 NATO with a 16″ cold hammer-forged barrel, the SPEAR-LT pairs a folding Minimalist Plus stock and fully ambidextrous controls for convenient carry and handling. The rifle uses a gas-piston operating system, features an optic-ready upper and an M-LOK handguard for accessory mounting. A factory QD-compatible flash hider supports suppressor-ready setups when compliant accessories are used.

Key Specifications

• The rifle is chambered in 5.56 NATO.
• The barrel measures 16 inches.
• The action is Semi-Auto.
• The barrel material is cold hammer-forged carbon steel.
• The operating system is a gas piston.
• The twist rate is 1:7.
• The trigger is a Flat Blade Match design.
• The accessory interface is M-LOK on the handguard.
• The muzzle is threaded 1/2″-28 tpi for accessories.
• The listed weight is 7.5 lb.

Built for modularity and real-world utility, the MCX SPEAR-LT blends modern ergonomics with proven engineering. Its folding stock and ambidextrous controls make it practical for compact carry and rapid transitions, while the cold hammer-forged barrel, match-style trigger and gas-piston system support consistent performance. Whether prioritizing a lightweight, configurable platform for range work or a compact system for transportable use, the SPEAR-LT delivers rigid construction and feature-forward design.

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