I have a radial brake on my rifle now that is a 5/8x 18 thread, if I want to change to a baffle brake in 5/8x 24 is my only option to cut off end of barrel and re thread.
Thanks
You could see if the brake you want could be bought without being threaded and then be tapped for a 5/8-18. Otherwise you'll probably need to cut the old threads off your barrel and start over.