Sig Sauer MCX Spear LT 5.56 NATO 11.5 in Pistol, 10rd

The Sig Sauer MCX Spear LT IR is a compact, semi-automatic AR-style pistol built on the MCX platform. It features an 11.5-inch cold hammer-forged carbon steel barrel and a piston operating system, finished in Gen II IR Cerakote for reduced IR signature and enhanced corrosion resistance. Configured for practical use at the range and in compact defensive or duty roles, the platform supports modular barrel interchangeability and M-LOK accessory mounting.

Key Specifications

• The caliber is .223 REM/5.56 NATO.
• The barrel measures 11.5 inches.
• The action type is Semi-Auto.
• The standard magazine capacity is 10 rounds.
• The package includes (1) 10-round polymer magazine.
• The barrel material is cold hammer-forged carbon steel.
• The rifling twist rate is 1:7.
• The operating system is gas piston.
• The overall length is listed as 29.75 inches.
• The product weight is listed as 96.1 ounces.

The MCX Spear LT IR pairs modern materials and SIG Sauer engineering into a compact, adaptable platform. With its corrosion-resistant IR Cerakote finish, threaded muzzle, M-LOK handguard and folding brace, it provides a balance of low-profile handling, modularity and field-oriented features for shooters who require a capable, compact AR-style pistol built to contemporary standards.