Is yours with or without the baseplate?I have not tried it in my AIAT yet but I have a problem in my AIAX getting the mag to release or drop out. I have tried adjusting the mag catch up and down and it just will not release. It feels like something is binding or catching with the Gray Ops Mag. If you have any insight to get it to work in your AIAX please let me know and I will test it out. Also, I will try it out in my AIAT when I get home this evening.
FYI, I using a full AIAT and AIAX rifle and not the chassis if that makes a difference.