SIG Sauer MCX-SPEAR LT Pistol, .300 AAC Blackout, 9 in Barrel, Coyote Anodized
The MCX-SPEAR LT pistol in .300 AAC Blackout stands out with its compact 9 in hammer-forged barrel, short-stroke gas piston system, and buffer-tube-less internal recoil assembly. It features ambidextrous controls throughout, a free-float M-LOK handguard with a full-length top Picatinny rail, and a durable coyote anodized aluminum receiver set. Factory details include a 1:5 twist for .300 BLK and a 5/8x24 threaded muzzle.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: The firearm functions properly. Exterior surfaces show scattered scratches and blemishes from prior handling.
What’s Included
- 1x 30-round magazine
- Folding rear sight installed on the top rail
Built on the MCX-SPEAR LT platform, this pistol uses a semi-automatic, short-stroke gas piston with a rotating bolt and an internal recoil system that eliminates the need for a buffer tube. An integral rear 1913 Picatinny interface is machined into the receiver. The gas system is adjustable, with a handguard access window and position pictograms for quick setting verification.
The 9 in carbon-steel, hammer-forged barrel is optimized for .300 BLK and cut with a fast 1:5 twist to stabilize heavy projectiles. A 5/8x24 threaded muzzle provides straightforward device compatibility. The bore presents a clean, mirror finish with sharp rifling.
Controls are fully ambidextrous, including the safety selector, magazine release, and bolt catch/release. The SIG Flatblade Match trigger provides a crisp, consistent interface. The free-float aluminum M-LOK handguard and full-length top Picatinny rail support secure accessory placement. A folding rear sight is installed from the factory.




