I was wondering if any of u Ar-15 shooters know where i could get a cap to cover my threads on the end of my barrel? took the muzzle brake off and would like to find a cover that screws on and is the same diameter as my barrel and looks like the barrel ,dont want to cut the threads off and recrown might want to put brake back on some day thanks. the reason i took it off because i use this rifle for target shooting off a bench and dont want the muzzle blast