Its marked with the TH prefix which makes it a mklll or a mkll super I think, certainly not a supersport and its painted rather than blued as a lot were, it has no counterbore at all and i am still undecided if it has been cut or came from the factory that way , the muzzle end and crown look absolutely factory but its nothing a decent engineer couldn't do with ease
Ps measured it the other day as i was trying to sell it but decided just to use it instead, its actually 14" in length and has a single hole for the front sight fixing