I've not tried the MagPul's in PTG metal, but I have a rifle with the CDI bottom metal, and the MagPul's work great in it. Rounds load, strip and feed flawlessly so far.Just looking to see how you guys are liking the Magpul AICS mags with the PTG or BO M5 bottom metal? (Not the Magpul bottom metal). Any hiccups and do they work as well as the AI mags??