Ok, so I built this SBR, which so far kicks ass. I'm having one problem that I could use some suggestions solving. I'm using a Troy Ambi mag release and so far my pmags are not dropping free, I have to rip them out to do a mag change. I've loosened the mag catch but it doesn't seem to be helping. Before I look into using a different part, do you guys have any suggestions on solving this issue. It's not a deal breaker, but it would be nice if I could get it to run a little smoother.