No, but I butchered the whole front sight and have no clue if I damaged the thread on the barrel. The front sight was FUBARed when my pipe wrench slipped and cut thru 2 layers of lether that I used to protect it. The whole top part is destroyed and the bayonet lugs are bent, plus the whole thing is dented.
I thought that everything forward of the front sight is the extension of it, but realized a hard way that the GL is sitting on the barrel and the bayonet locking part is a continuation of the front sight.
PS: just noticed that the pipe wrench did not just slip, It's broken.