This barrel had the muzzle brake pinned and bind welded.
Fast Forward..............
Now the pinned brake is no longer an issue. So, I decided to send the barrel to Adco to have the brake removed safely. The service was good, got the barrel back and it looked great. I happily mounted my AAC Blackout F.H. on it.
Fast Forward a little..........
AAC comes out with the Brakeout 2.0 and I'm like damn it! Now I ordered my Brackeout 2.0 and it's on the way. Then I am faced with the task of removing my Rocksetted AAC Blackout F.H. So tonight I got ambitious and removed it. Things went beautifully and I got the Blackout off nicely. Then I noticed something, a bump inside the end of the bore. At first I thought that it was some dried Rocksett as I never had a chance to fire it after I put on the Blackout. Upon further inspection I noticed that this bump was on the exact opposite side of where the divot in the barrel is from being pinned. You can see it below in the photo. (don't mind the crusty crown, I still have to clean some Rocksett off)
This bump is on the land roughly 1/4-1/3" before the crown, I think that the white dot is a spec of dust. Obviously, I am freaking out a lot. I am a little puzzled because when the barrel was originally pinned the accuracy of the rifle was great. I'm wondering if it's not effecting accuracy or was it possible the pin got driven in farther when Adco removed it?? Now I'm also worried about a baffle strike when I get my SDN-6. No matter how you slice it I'm not feeling good about this.
I wonder if it will be ok like this or will I have to get it cut and do a re thread. Then if it's too short I'll have to get the Brakeout 2.0 permanently attached to avoid an NFA no no...
I reckon it would be less expensive than a new barrel assembly.