C PRODUCTS AR-15 MAGAZINE .223/5.56 NATO766897410949 C Products Defense's . 223 Remington 5. 56 NATO magazines are constructed from a specially heat treated 400 series stainless steel process to meet the needs of today's combat conditions. These magazines are extremely durable and dependable, and routinely outperform the MIL SPEC aluminum magazines in almost every test. This AR 15 magazine includes a Black T finish for smooth, low friction function that even handles dirty ammunition. The