For what its worth, I have been running a Strike Industries Checkmate on my 18" rifle, and it has been an awesome comp for the money. Keeps the muzzle flat and isn't nearly as punishing as some of the other comps out there. I just order the Strike King Comp for my 14.5" to be pinned. For the money, and I believe he says it in one of the comp tests on TTAG, strike industries brakes are awesome.