If its 28 M.M. the *^%#! FSR OS / HP ( and an Enya ) ones'd match .
The Toungue ( C.S.C. ) is rowdie but runs superior , In my experiance .
Thisisa ' pirate ' copy .
Has three holes ( 6 mm ? = depth of OS Exhaust ) in a block of Alloy , with three slots catching them ( half depth ) outlets .
Need to grind a bits end flat , really . to get the end bit . Three holes bored thru. NOT a rectangle ..
Anyone got a real one - I'd like it , or trade / etc .