Bushmaster Barrel, marked as such, 1/9 twist. Bushmaster gas block with pins. Barrel has less than 2000 rounds and is chrome lined. Good shooter, heavy under the guards. Pigtail gas tube slows action down and helps the gun return better. Barrel was drilled for 2 different FSB so it has 3 holes instead of 2.
I need a Bolt, Carrier and Charging handle. I would also consider a McCormick Match trigger or KAC 200-600 flip up sight. E-mail for pics.