Do it.
I have the 14.5" complete and a 10.5" upper on a Bushmaster lower. No problems. The 10.5" upper came with a BCG that I had to replace the firing pin retaining pin. Using Pmags/LAR10's and all is well.
I have the 14.5" complete and a 10.5" upper on a Bushmaster lower. No problems. The 10.5" upper came with a BCG that I had to replace the firing pin retaining pin. Using Pmags/LAR10's and all is well.





























The gun that I enjoy the most is my less expensive ones.





















