Proof Research 20 inch Sendero contour carbon fiber barrel (1:8) for an Impact 737. Barrel was bought and installed via Altus Shooting Solutions. Less than a year old and has approx. 100 rounds through. Only wanting to sell to build a dedicated PRS rig. Has only seen factory Hornady match 75gr BTHP's, groups about 1/3 moa. (Does not come with the brake!) Looking to get 800 shipped TYD (CONUS).