Re: SBR rail for Ops Inc 15th
With a 11.5" barrel. any of the 7" rails with worth if you are using the FSB. Any of the 9" rails will work if you use a micro gas block and hide it under the rail. I have a 16th which should share the same mounts as the 15th, 14th and M4S, and I used a 10" rail milled down about a half inch so that there is no barrel showing at all when I mount the suppressor. The suppressor is a little long, but isn't that much longer then a 16" M4, about a half an inch or so. I also have a M4S on the way for a compact SBR with suppressor. There are also some hand guards that have a big enough inner diamter that a suppressor can fit inside the tube for a integral suppressed look. If I was to do it again, I would probably gotten a Spikes rail.
