Nice video, I hope you get your FTF issue figured out. I'm running all the same parts as you but with a 16" barrel, on a NFA Glock lower. Very happy with the Kaw Valley parts, I saw that Joebobs has 10oz KVP 9mm tungsten buffers and was thinking of snagging one, but it's been running fine so "if it ain't, broke why fix it" rings true here.