Is the muzzle attachment readily removable on the 7.62 x 39mm rifles? How is the muzzle attachment fixed to the barrel?
No. Since the original barrel length is less than 16 inches, a muzzle attachment must be permanently attached to achieve the 16 inch barrel length required by federal law (Title 1 firearms). All muzzle attachments have had two holes drilled through the threaded area. The muzzle attachment is screwed onto the barrel (14×1 rh threads) and welded into the threads. The weld penetrates into the threads of the barrel while filling the holes of the muzzle attachment. The barrels are then turned on a lathe to remove excess weld. Result: the welds are difficult to see when covered by paint.
