Sig Sauer MCX SPEAR-LT IR 5.56 11.5in | 10rd

The Sig Sauer MCX SPEAR-LT IR is an 11.5-inch AR-pattern pistol in 5.56 NATO finished in Gen II NiR FDE Cerakote. It uses a gas-piston operating system with a SIG flat-blade match trigger and ships with a single 10-round polymer magazine. For a compact optic that pairs cleanly with this platform and stays under $1,000, consider an Aimpoint PRO red dot for robust, no-nonsense sighting performance.

Applications: range training and practical/tactical competition where a compact, piston-driven 5.56 pistol is appropriate.

Product Specifications

• The caliber is .223 REM/5.56 NATO.
• The barrel measures 11.5 inches.
• The action is Semi-Auto.
• The magazine capacity is 10 rounds.
• The package includes one 10-round polymer magazine.
• The overall length is 29.75 inches.
• The folded length is 26.25 inches.
• The receiver finish is Gen II NiR FDE Cerakote.
• The stock is a folding brace with push-button hinge.
• The operating system is a gas piston.
• The muzzle is QD flash hider, 1/2 in-28 tpi.
• The trigger is a SIG Flat Blade Match.
• The optic footprint is PICATINNY.
• The accessory rail is M-LOK.
• The UPC is 798681699650.

The MCX SPEAR-LT IR blends a compact 11.5-inch barrel and a lightweight handguard with SIG’s corrosion-resistant Gen II NiR Cerakote finish, making it a practical choice for shooters who want a compact, piston-driven 5.56 pistol with modern accessory compatibility. Its threaded muzzle and Picatinny footprint make it straightforward to fit an optic and muzzle device or suppressor-capable component as local laws allow.

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