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Randy, yes Sir they will. As long as the thread pattern is the same as your pistol, 9mm compensators will work.

Randy - Yes, it will fit as long as the thread patter is a match. I looked for the thread size on the FMK barrel and could not locate it, but one would assume the threads are SAE rather than metric, as these pistols are made in the USA. Should be 1/2X28 threads.