An Octagon-to-round, smooth bore barrel for Fowler and Trade guns. The 42" long barrel measures 1-1/16" octagon at the breech tapering down for 14-3/4" and ending in wedding bands. The round portion just in front of the wedding bands measures .875" and tapers to .780", 14 inches from the muzzle. The last 5" flare back to .843" at the muzzle. Available in .62 caliber only. Uses .600 round ball. Barrel comes with breech plug installed and finish crowned. No. 4016020