This is a CMMG Magazine known as the MkW-15 chambered in 458 Socom, model 48AFC44.
After extensive testing of magazines for the 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 ammunition on the market by modifying the way the feed lips hold the ammo. The feed lips are not machined or weakened. (Laser Engraved 458 SOCOM)
Features:
Steel Feed Lips
Modified L5 Advanced Warfighter Magazine
10-Round Capacity