This is a new upper I bought, and had Noveske remove the fsb and replace with lower clamp on for a LR pistol build. Looking for new Vortex PST FFP, or 2nd FP, with 100 new Lapua 260 brass, and box of 139 scenars. I have well over $1100 in it. 1/7tw, 10.5" carbine gas tube, MPI, chrome lined. Shot one to 500 before I bought this one, and I'm going to sale my pistol lower, and too much time for SBR. Also can come with .750 VAIS Brake if for FFP. Pic of VAIS brake. All new test fired at Noveske, when work was done.