I have a Mossberg smooth bore 22 that was given to me without a bolt or clip. It sat around for years and looked like scrap Iron to me. A little rusty on the outside. One day I ran a patch thrue the barrel and was suprised to see that it was pristine and a smooth bore. Now that explaned why the muzzle was threaded. I thought it was for a silencer. I picked up a bolt at a gun show and a friend made a choke for it. Now when I go carpenter bee hunting I can hit them at 15 feet rather than 5 feet with the cylinder bore.
