Forged from 7075 T6 AluminumPrecision Machined to MilSpec AR15/M4 DimensionsCompatible with all AR15/M4 MilSpec PartsBeveled Magazine WellMarkings are Machined (not stamped)Caliber: "Multi" - build 223/5.56 NATO, 350 Legend and 224 Valkyrie, etc..Hard Coat Matte Black AnodizedMade in USA Quality