The SIG Sauer MCX-SPEAR LT is the latest evolution of the MCX family — a lightweight, highly modular 5.56 NATO carbine built for durability, accuracy, and user configurability. The 16? lightened profile barrel (1:7 twist) rides under a long ergonomic M-LOK handguard and terminates in a SIG Clutch-Lok / QD suppressor-ready flash hider with 1/2-28 muzzle threads, while the short-stroke piston system and two-position gas regulator promote reliable function in adverse conditions. Fully ambidextrous controls, a flat-blade match trigger, and a folding/telescoping stock make the MCX-SPEAR LT comfortable and intuitive for a wide range of shooters, and it ships with a single 30-round AR-pattern magazine for 30+1 capacity. Available in black or coyote/FDE finishes, the MCX-SPEAR LT blends premium fit-and-finish with military-grade features for operators, competitors, and serious enthusiasts alike Sig Sauer MCX 5.56 NATO 16" Bbl Semi Fold Stock AL MLOK HG Blk Rifle/(1) 30rd Mag RMCX-556N-16B-LT-B