This is a 4-round 6.5 Grendel magazine, manufactured by Alexander Arms.

Its strong, heavy-gauge steel body construction will endure the most extreme elements. With its protective coating, this Alexander Arms magazine has a long service life for years to come. This magazine has an enhanced follower with a self-leveling floating design that allows for up to 4 rounds of 6.5 Grendel. Pick a few up at The Mag Shack.

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