The Sig Sauer MCX-SPEAR LT 9" Upper 300BLK FDE transforms a standard M4 or AR-15 lower into a modern, compact platform built around the proven MCX architecture. This complete 9-inch 300 Blackout upper assembly features a removable 3-prong flash hider ready to accept compatible SIG SLH and SLX suppressors, along with a sleek flat dark earth finish and integrated top rail for optics and accessories.

Designed for shooters who want a refined, adaptable upper, the MCX-SPEAR LT uses a dual rod recoil assembly that eliminates the need for a traditional buffer system, opening the door to folding or static stocks on lowers equipped with a vertical 1913 rail adapter. Its adjustable gas system and quick-change barrel design support a wide range of ammunition and configurations, making this upper ideal for range use, training, and general-purpose shooting. Sig Sauer’s reputation for innovation and precision engineering is evident in every detail of this upper receiver.

Key Features:

• Manufacturer: Sig Sauer
• Model: MCX-SPEAR LT 9" Upper 300BLK FDE