This is the most widely used and popular brand magazine for the 9mm AR-15. Rugged, all-steel, high-capacity magazines for 9mm AR-15 conversions that use a Colt-style magazine. Metal follower will not distort under a full load and aids smooth, reliable feeding. Hold-open feature works with ARs fitted with hold-open feature on the conversion block. Easy-to-remove floorplate makes disassembly fast and simple. Fits All major brand conversions with a lower receiver conversion block. Mfg: Metalform SPECS: Cold-Rolled Steel, Black Oxide Finish, (20 round)
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It wouldn't drop free. Slightly too wide front to back at the top! A gentle massage wrapped inside a soft cloth in the vice and voila. Drop free
Good finish on the mag. Works well fits very good in my Rock River.
No issues in the Hahn dedicated mag block