Thread: threading odd muzzle

well agricultural me.....looked at picture and thought...find bolt threaded 1/2"-20 and cut the head off it,see how snugly it fits smooth shaft size into mouth of muzzle bell....drill largest hole through guts of bolt you can without going off centre or hitting threads....6-7mm would be ideal....smooth off the end you cut bolt head off as best you can,slide it into mouth of bell,right up hard against muzzle,insert fattest cleaning rod that will slide down barrel from breach end and see it clears insert properly,if not make another untill it will do....tape in place for testing...try a shot and see if nothing touches and projectile hits target.when happy that is all good...screw suppressor onto insert and try cleaning rod again....posibly loctite insert into place....and you should be away laughing....MUCH easier to make one up with lathe...but if you just happen to have lots of time on your hands,and a bolt of right diameter and thread....