100% sure. I appreciate the insight guys. I will pull it apart and try again.
[QUOTE=4G010H3R0;2532600]are you 100% that is a TPX barrel? does it say TPX on it? Ive read that Barrels that are not for the TPX sometimes cause issues(not entirely sure why but have read that somewhere.)
I wouldnt remove that bumper. I actually milled my block a bit so the O-ring sits deeper and glued mine into place to prevent it from moving around. Its there till I tear it off.