D&H Tactical metal-bodied AR15 magazines have become the trusted brand at the firing range, in competition, in the field, and the woods. Each magazine is built in the USA to the most demanding military specification and crafted from the finest grade materials. You can count on D&H Tactical magazines to stand up to the elements and deliver precise performance on demand.Specifications and Features:Heat Treated Aircraft Grade AluminumCapacity: 4 RoundsCaliber: .450 Bushmaster17-7 PH SpringCorrosion ResistantD&H Proprietary Black Follower for Big Bore CartridgesLaser Engraved Caliber LogoHard Coat Anodized Black FinishMade in the USA