I have recently acquired a Savage pump shot gun manufactured in 1921. I was preparing to clean it and was able to disassemble the gun with no problem. Now comes the problem....I am unable to reassemble the shot gun.. I am unable to find anything on the web on how to reassemble the gun. I can get the barrel and the magazine back into the receiver but the operating handle bar is not picking up the bolt. I hope that I am describing the problem I am facing accurately. Any suggestions would help.