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CMMG 5.7x28mm rifle magazine for MK4 AR-15 platforms. Key Features: 10-round capacity; matte finish; designed for CMMG 5.7x28 Radial Delayed Blowback uppers and Mk4/Mil-Spec AR-15 lower receivers; upgraded feed lips for consistent, reliable feeding. Specifications: Brand CMMG; MPN 54AFC44; UPC 810097507630; Caliber/Gauge 5.7x28mm; Magazine Capacity 10; Platform AR-15.
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