After extensive testing of magazines on the market for .458 SOCOM the Lancer L5 Advanced Warfighter Magazine was the top choice due to the polymer body and steel feed lips. The CMMG modified Lancer L5-AWM takes this top of the line magazine and perfects it for the wide range of 458 SOCOM on the market, by modifying the way the feed lips hold the 458 SOCOM without machining or weakening the steel feed lips. Features: Laser Engraved .458 SOCOM Impact resistant polymer body Hardened steel feed lips Non-tilt follower Aggressive texturing on body for positive grip