A 30-round polymer magazine for AR-15 pattern rifles, cut for both 5.56 NATO and .300 AAC Blackout. The dual-caliber compatibility is convenient for anyone running more than one upper, since the same magazine body feeds both cartridges reliably. Polymer construction means it will not dent the way an aluminum body can when dropped on concrete during reloads, and it resists corrosion in a range bag or truck box.

American Tactical builds these as a practical way to deepen a magazine stash, which is exactly what most AR owners actually need. Black finish, standard dimensions, and it drops into any mil-spec magazine well.

In stock and ready to ship straight to your door from Dawson Defense, an Arizona-owned licensed dealer.