I have that same gun. It is a B7 Chinese for sure. It has those same markings on the barrel. Mike Melick put it back together for me after I took it apart, kinda. I didn't know what it was until he identified it for me. Rachet style cocking lever, front sight raise and lower with a screw twist, but plate some kinda of metal one stage triger. Fun shooter don't have a crony. Fps? Mine is about 23-25 years old. I don't know how to send pics, have some of my son and I having fun.