The Geissele Automatics MRGG 30-Round Magazine is a premium, high-capacity feeding solution engineered specifically to meet the rigid field-performance demands of the US SOCOM Mid-Range Gas Gun program. Constructed from rugged 410 stainless steel with a sleek black nitride finish, this magazine offers superior structural rigidity and unyielding cold-weather durability that easily outperforms traditional polymer alternatives. It is engineered using a robust two-piece design joined by a single laser seam weld on the front and back, completely eliminating the failure points common to conventional spot-welded magazines. The critical feed lip geometry is mathematically optimized to ensure cartridges sit at the absolute perfect presentation angle, maximizing feeding consistency and stopping nose-dives or failures to feed. Dropping seamlessly into any standard AR-10 platform, this extended 30-round magazine delivers reliable operations across multiple main battle rifle calibers, including 6.5 Creedmoor, .308 Winchester (7.62x51mm NATO), and 6.8x51mm. Geissele Automatics MRGG 6.5 Creedmoor/.308 Winchester 30rd Magazine 05-3488