My Tristar semi auto 12 gauge has functioned perfectly for a year or two but locked up. I disassembled and cleaned but now the barrel will not seat all the way into the receiver. I cant get the dang thing back together. Tried taking the trigger group out and various combinations of safety on, hammer down or the reverse. Frustrating as all get out because it should be EASY. Can't find anything about reassembly in the manual or anywhere on the web that tells me I'm doing anything wrong.
It is very similar to a Charles Daly semi auto. Designs are almost identical.