I have read in a few places online of guys taking a standard 3/4x24 ASR brake and mounting them to their Knights SR25's for mounting a suppressor. I even spoke with silencerco about this and they said it should be alright to mount up to the SR25. I spun the thing on my ECC and it didn't seam like a very solid wall when it bottomed out. This is when I spoke with Silencerco and they said it should be fine, also when I read multiple places where guys were doing it. I took it out to shoot it and it shot fine, when I went to unscrew the can from the ASR, the brake came off with it. It took way less torque for the brake to come off than it did going on. I started looking at it and taking some measurements and sure enough, the muzzle of the ECC wasn't even close to bottoming out on the internal wall of the muzzle brake. At least on my ECC's muzzle there are threads, then a thread relief, then back to the .750 barrel. What was happening was the threads of the ASR would go over the muzzle brake, then the thread relief, then start digging into the barrel itself. Not sure how this wasn't a known thing online as well as with silencerco. I chucked the ASR in a 3 Jaw very carefully and cut out the back .200" of threads. Then the brake bottomed out just fine on the muzzle of the SR25 and I used the KAC shim kit to time it perfectly.
I very lucky I didn't get a baffle strike by shooting it before removing the threads. Just thought I would share my experience and fix to this problem.
I very lucky I didn't get a baffle strike by shooting it before removing the threads. Just thought I would share my experience and fix to this problem.