I finally picked up the Stevens 67 20 ga. pump today for my son. 28 " barrel Series "E" .Serial# E430664. does the barrel come off. I don't think it does. It seems to be secured to the receiver. It appears to be Mod or IC fixed choke. Also, is it normal for the brass to stick out of the mag tub about 1/2" and not stay completely in? It cycles fine. We shot it at the range about 50 shells. busted clays. We are now going to to tear it down, refinish wood, reblue. Will post pic when done.