I've been running these for 3gun, training classes and 5 of them as dedicated 300blkout mags. Feeds the 300blkout 100% and the 5000 to 6000 of 5.56 that I've put thru the rest have functioned perfectly. Used 10 hexmags exclusively during a D3 Carbine class from Haley and then again during a D5 Carbine and they function just fine.


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