The Sig Sauer MCX-SPEAR LT IR is a compact pistol variant built on the MCX platform chambered in .223 REM/5.56 NATO. It features an 11.5-inch cold hammer-forged steel barrel and a Gen II NiR FDE Cerakote intended to reduce IR signature and increase corrosion resistance. The system uses a short-stroke gas piston operating system and a folding pistol brace for compact transport and storage.
Key Specifications
- Chambering is .223 REM/5.56 NATO.
- The barrel measures 11.5 inches and is cold hammer-forged carbon steel.
- The barrel has a twist rate of 1:7.
- Barrel threads are 1/2 in-28 tpi for muzzle accessory compatibility.
- The action type is Semi-Auto.
- The operating system is a Gas Piston design.
- The stock is a Folding Brace with push-button hinge for reduced folded length.
- The receiver finish is Gen II NiR Flat Dark Earth Cerakote.
- The handguard features M-LOK attachment points.
- Includes one 10-round polymer magazine.
Purpose-built for users who need a compact, modern 5.56 pistol platform, the MCX-SPEAR LT IR combines corrosion-resistant finishes, modular controls, and an M-LOK-compatible handguard to support a wide range of uses from range work to compact carry configurations. Its combination of a short-stroke gas piston system and interchangeable-barrel design makes it a versatile option for those who value durable engineering and contemporary features.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.
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