Comfortable addition but may need fitment. - IMI Defense Ergonomic Magwell Grip w/ Integrated Enhanced Trigger Guard

I had no real issue attaching this to a PSA lower (I did tap the lower for the allen screw it came with), but I have a couple of 10 round polymer mags that fit a little too tight. One is FAB defense, not sure of the other brand off-hand. They would insert but wouldn't drop free without prying a bit. I removed a little material from inside this magwell, sanded and polished it out and it works great. Regular metal/Pmags would fit just fine without modding so I can't complain. I need to put more rounds through to comment on the ergonomics but so far I like the close-up grip option while helping to keep my hand off of the magazine itself.