Built for shooters who demand dependable feeding and rugged performance, the SIG SAUER MCX-SPEAR Multi-Caliber 20-round magazine is a factory replacement designed for the MCX-SPEAR and compatible AR-10 Multi-CAL platforms. Precision-crafted from steel and finished in coyote, it delivers a solid in-hand feel and the durability to handle hard use at the range or in the field.

Engineered for multi-caliber versatility, this magazine supports 7.62 NATO, 6.8x51mm, 6.5 Creedmoor, and .277 SIG FURY loads, giving you the flexibility to adapt to different setups without sacrificing reliability. Side witness holes make round checks quick and easy, while the 20-round capacity offers a practical balance of firepower and control. Accepting rounds up to 2.850 inches in length, it is built to meet the demanding standards expected from the SIG MCX-SPEAR system.

Whether you are training, competing, or outfitting your rifle with a trusted factory mag, this steel magazine is made to keep performance smooth, secure, and consistent.