The Sig Sauer MCX Spear-LT IR is a compact AR-style pistol chambered in .300 AAC Blackout with a 9″ barrel and a 30-round magazine. It employs a gas-piston operating system and a folding pistol brace for compact storage and handling. The receiver finish is described as Gen II NiR Flat Dark Earth (FDE) Cerakote, and the fore-end features M-LOK attachment points with a Picatinny optic footprint. This configuration is tailored for short-barrel use and accessory versatility.
Key Specifications
- Chambered in .300 AAC Blackout for compatibility with standard 300 BLK loads.
- The barrel measures 9 inches for compact handling.
- The firearm feeds from 30-round magazines (one included).
- The action is Semi-Auto.
- Operating system uses a gas piston for reliable cycling.
- The barrel thread pitch is 5/8 in-24.
- The twist rate is 1:5.
- Equipped with a folding pistol brace for compact transport and storage.
- Finish is Gen II NiR Flat Dark Earth (FDE) Cerakote on the receiver.
- Features an M-LOK handguard with a Picatinny optic footprint.
Compact, configurable, and built around the MCX platform, the Spear-LT IR offers a short-barrel option for users who need a portable AR-style pistol with modern attachment options and a corrosion-resistant Cerakote finish. Its gas-piston operation and accessory-ready handguard make it suitable for precision-minded shooters who value modularity and low-profile setups.
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