Picked up these 6.5 grendel mags as back ups a few months back when the 7.62x39 AR magazine situation looked dire when c-products when under but never ended up using them. I loaded them up with 20 rounds but immediately saw that the nose of the rounds hit the front of the magazine and would never feed into the upper, that being said they can probably be made to work with the 7.62x39 round with some time with a dremel and cutting the anti-tilt feature from the follower but that now seems more of a pain being that 7.62x39 AR mags are readily available, so I rather see them go to someone that actually needs them.
Thanks,
Fred R.
