11.75 inch Boa hard chrome Line si or Montneel barrel, great shape, id=.693. Excellent shape but has one set screw mark from barrel retaining screw. Od is about .853-.865 which is not enough to stabilize the pump handle on a line si bushmaster. So this would be better used on a promaster or montneel semi automatic. Length of barrel (not at breech) is .80 inch. Bore looks great.
