Would that be a brake made by Christensen Arms specifically or a brake that will screw onto that barrel? I have a ZRO Delta Cowl Induction brake that would fit the barrel in question. Caliber?
I have a Christensen Arms muzzle brake that came off a 26" 6.5 CM carbon fiber barrel. It's threaded 5/8-24 and I still have the conical washer that goes under it. It's the one with the tune-able ports, stainless steel.