The Sig Sauer MCX Spear-LT in .300 AAC Blackout (brand part no. PMCX-300B-9B-IR) is a semi-automatic AR-pattern pistol built around a 9-inch barrel, pairing Sig’s modern MCX platform with a subsonic-capable cartridge. Sig Sauer finishes this SKU in Coyote and ships it with a 30-round magazine included, running an ambidextrous lever safety and no fixed sights. Among AR-pattern pistols in the AR pistols category, the MCX Spear-LT favors shooters who want a .300 Blackout pistol ready for suppressed use.

Key Specifications

• Chambered in .300 AAC Blackout.
• Operates as a semi-automatic AR-pattern pistol.
• Features a 9-inch barrel.
• Uses a 1-in-5-inch rate of twist.
• Ships with a 30-round magazine included.
• Runs an ambidextrous lever safety.
• Ships optic-ready with no fixed sights.
• Finished in Coyote.
• Ships at approximately 8.2 pounds.

Frequently Asked Questions

What rate of twist does this barrel use? 1-in-5-inch, suited to heavier .300 Blackout subsonic loads.

Does a magazine ship with this pistol? Yes, a 30-round magazine is included.

Buy the Sig Sauer MCX Spear-LT Pistol

A .300 Blackout pistol built for suppressed use is exactly what the MCX Spear-LT delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.