I've used the CMK Hotbarrels for my old Tamiya Hunting Tiger, the old Tamiya SU-85 and for the Tamiya JS-3 heavy tank. They are nice, include a resin mantlet (Hunting Tiger did, don't recall if the JS-3 did) and the JS-3 did include a resin muzzle brake. I found the resin muzzle brake to be better than the Jordi Rubio white metal muzzle brake (I accidentily bought both). I do not recall what the SU-85 barrel came with, I will check and and post the information here.