Hi All, I just recently purchased a Glock 27 GEN4. I am looking at a 40-9mm conversion barrel. I am contemplating the following; -EFK fire dragon -Lone Wolf -KKM I am looking for G27 GEN4 experiences "specifically" and "only". I am not trying to be rude. I realize numerous of you have had excellent experience and results with the aforementioned manufacturer's in your various Glocks, but I am just inquiring about the G27 GEN4. I thought I read somewhere that there were some problem/tolerance issues with the GEN G27 conversion. Any and all help would be greatly appreciated!!!!