Proof Comp Contour 223 Rem 26" 1 in 7 Twist TL3 Prefit (will work on origin with Hunts Recoil Lug and I have an extra available to buyer for extra cost if needed) ......400 rds fired and has shot everything sub MOA easily and was right at half MOA with 69gr BTHP and less than that with 75gr BTHP...Muzzle is Threaded 5/8x24 .........400 Shipped .....