I picked up this SBR upper a while back, to run on my Billet SBR lower.
It is a Ranier Arms UltraMatch Billet upper, with a 10.5" Stainless Ranier Arms UltraMatch barrel, Daniel Defense 10.0 Lite hand guard, BCM BCG, BCM gunfighter charging handle, and I mounted an Aimpoint T1 in a Larue mount on it. The upper came to me with a 51T AAC mount on it that I intended to screw my M4-2000 on to, and shoot it suppressed. Only problem was, the .5" different between the barrel and rail didn't provide enough clearance for the suppressor, so it would not fully engage the mount... Bummer.
It has been sitting in the safe for months unfired, but in anticipation of the upcoming silencer shoot, I figured that I had better take it out in the shop and make it work.
I was a little bit apprehensive about going at the DD rail with a drill, but I figured what the hell. I started off by removing the rail system from the upper and boring out the center with a 2" step bit, I then removed additional material by hand with a file and tapered the 4 rails of the quad rail with my 1" belt sander until the silencer cleared. I think that it turned out really nice and most importantly I can now mount the can
.
It is a Ranier Arms UltraMatch Billet upper, with a 10.5" Stainless Ranier Arms UltraMatch barrel, Daniel Defense 10.0 Lite hand guard, BCM BCG, BCM gunfighter charging handle, and I mounted an Aimpoint T1 in a Larue mount on it. The upper came to me with a 51T AAC mount on it that I intended to screw my M4-2000 on to, and shoot it suppressed. Only problem was, the .5" different between the barrel and rail didn't provide enough clearance for the suppressor, so it would not fully engage the mount... Bummer.
It has been sitting in the safe for months unfired, but in anticipation of the upcoming silencer shoot, I figured that I had better take it out in the shop and make it work.
I was a little bit apprehensive about going at the DD rail with a drill, but I figured what the hell. I started off by removing the rail system from the upper and boring out the center with a 2" step bit, I then removed additional material by hand with a file and tapered the 4 rails of the quad rail with my 1" belt sander until the silencer cleared. I think that it turned out really nice and most importantly I can now mount the can
.
