My octane 45hd should be out of nfa jail next month and need to get a threaded barrel. I wrongly figured that this popular model would have a threaded barrel available or at least I havent found one. Id rather not get my factory barrel modified. If thats whats required I'll just get a 4.5" or a G21. Ive only found Barsto that makes barrels for them but at 400 bucks I'd rather put that money toward another gun and threaded barrel. Itd be more expensive but I'd at least have another gun.