I am looking into putting together an unlimited G-34. As part of this, I am considering a KKM Barrel with 4-port comp. I have talked with a local shooter who has vast experience in GSSF, but looking for everyones opinion. I would like some solid feedback before I drop $245 on the barrel. SO, Glock 34, Carver mount, 13lb recoil spring with KKM barrel/comp, all opinions welcomed.