The L7AWM(R) is an AR-10/SR-25 pattern rifle magazine constructed from a proprietary lightweight polymer with hardened steel feed lips that wrap completely around the magazine, maximizing stiffness and reliability while preventing dimpling in the front of the magazine. A switchable drain lock in the floor plate comes standard on all L7's, allowing the user to configure the magazine for marine applications or extremely dusty conditions.To develop the toughest and most reliable .308 Win / 6.5 Creedmoor polymer magazine on the market, Lancer took engineering inspiration from the L5AWM(R) and the SIG Sauer SIG MPX, combining the best advantages of both to bring the L7AWM 7.62X51mm magazine to market.The L7AWM(R) is constructed from lightweight polymer with hardened steel feed lips that wrap completely around the magazine to maximize stiffness and reliability while preventing dimpling in the front of the magazine. A switchable drain lock in the floor plate comes standard on all L7's, allowing the user to configure the magazine for marine applications or extremely dusty conditions.The L7AWM is designed to be compatible with a multiple of weapon systems, including the SR-25, DPMS AR-10, SIG 716, LMT, LM308, POF P308, and S&W M&P-10.Designed, tooled, manufactured, and assembled in the USA.*Not compatible with Armalite AR-10B, Springfield Armory M1A, Rock River Arms LAR8, FN SCAR 17S, PTR-91, HK417 or other rifles that utilize M14, FN FAL, or HK 91/G3 patterned magazines.