Hello
I have a 1077 and the i need to change the o-ring i took the gun apart and i could not get the little cylinder on the under side of the valve that the co2 goes in. can anyone help me

Now that i took the gun apart i can't seem to get the trigger working right i know exactly how it works and how to put it on but when i put the plastic back on the trigger never works.

Can any one help me

Hey everyone I have the same problem, I just so happen to need to change my o-ring too or whatever it is that is making the connection between the small copper tube and port on the Co2 chamber. anyways I would like if someone explaned how to change it. please

I just removed my end seal, part38-128. The only place found that sells them is jim@crookedbarn.com, $5. I never could find link to parts on crossman home page. The press in metal roll pin (1077-31) has to be removed so the assembly can be pulled from the tube. I used some pliars with teeth and grabbed the pin and turned it counter clockwise many times, and also pry'd against tube many times till it came out. Back to the start, after removing stock, i layed it down on left side, took out 4 screws and kept my finger gently holding down trigger as I removed the plastic cover. You should imediatly remove the spring or the trigger will fly out before you know it.

http://www.chambersgunmakers.co.uk/Crosman%20plans/1077%20plan.htm