12.5 w/ SPR M4 Questions...

[Mr. Goodtimes]

I've finally decided on a barrel length. I'm going to go with a BCM 12.5 and use an SPR M4, as the can would be perfect for both my SBR and my 16in Middy. With the Can attached to the 12.5, it would come to the same length as my 16in gun w/ muzzle brake.

My question is, would I be able to use a 10in Rail (either DD or Larue) with the 12.5 in barrel?

According to AAC's websight the 51T Miter mount is 4.25in long adding 1.75in to the length of the barrel, so, according to my math it should overlap 2.5 in, which means it probably won't work. I'm asking if anybody has done it or seen it done, though, just to make sure as this would be a sweet setup.

If the 10in Rail wont work I'll use a DD MK18 RIS II.

Weather I use a RIS II or a 10in rail, I think this will be a real winner of a setup. It seems to have a lot going for it.