Hi there
I hope this is not a repeat thread.
I have recently finished my first 9mm AR build and am having feeding issues.
Adco 4.5" barrel
QC10 GSF
Vltor upper
Using original Glock mags
Seems the rounds are getting caught on the sharp chamber edge beyond the cone.
Had a Wolff XP spring with an Slash's HSS buffer. But swapped that for a regular spring and an H3 buffer. That fixed the cycling issue but I still encountered FTF almost every other round.
My question is:
Since I live up in Canada, getting the barrel back to you or having it machined back in the US is out of the question as it is far too complicated.
I was hoping for an at home fix. Was thinking breaking that edge slightly and polishing it but wanted your thought/opinion first.
See below photos as reference:
Any help would be greatly appreciated.
Thank you