Ok thanks for the reports and sorry for my late reply’s! I ended up with a TACCOM upper and QC10 lower, HiperFire 3G trigger finally got to run it yesterday and it ran like a sewing machine with both 124 and 147s. Also on a side note, a buddy I shoot with also PCC had a couple ETS Glock 18 31 rnd mags with MBX Minis attached. The mags ran flawlessly in both our guns! I tried a Glock 17 MagPul Pmag and it would lock in but not allow the bolt to go forward and chamber a round. Just food for thought if you are looking for a great mag to run in your Glock Mag fed PCC and want to save some money look at the ETS. Sent from my iPhone using Tapatalk