Originally Posted by RNMKR_Actual01
I also am building my first M4. So far so good. One issue. I want to use an original M4 barrel with the slots under barrel for the A-2 front sight. The hiccup, there is a muzzle break on it that doesn't appear to be welded and has to pin holding it. Is there some kind of epoxy? If so, what is the best way to remove it without damaging the brake or the barrel? Like he said, thanks in advance. My thought is to use a torch to heat the epoxy and take off the brake with a wrench. Any thoughts?
An actual M4 barrel is 14.5 inches and therefor falls under the NFA, a rifle must have a barrel of at least 16". By pinning and welding the flash hider or brake in place, this is considered part of the barrel because it isn't removable.
If it isn't welded, it isn't legal without a tax stamp
It is possible that it has been soldered, I'm not sure of the legality of that, but it could be removed.