I have a M40A5 clone with a surefire 7.62 brake. I recently purchased a custom .338 Lapua with a surefire .338 brake. I want to use my surefire .338 can on both rifles. Is it as simple as switching the brake on the 7.62 to a .338,or is there machining involved? The part numbers on the brakes are MB338SS02 and MB762SSAL/RE if that helps. Thanks in advance. TJR