anyone here having problems with "tight mag wells" on aero precision lowers? especially with pmags. noticed it after i installed the parts kit. i tried backing out the mag catch but still a tight fight. on my anderson lower, the mag drops freely. i sent out the aero lowers back to aero precision in tacoma and they said the lowers are within specs. some of my buddies also have the same lowers experiencing the same problem and some aren't. i tried sanding the mag well and also changing the mag release, didn't solve the problem. any ideas?