sc 600 trigger problem

[used man]

My friends sc 600 was broken so i brought it home to fix. I found that there is a problem
with the trigger. I got a crack open, reached in with a flat head and pulled the valve to get it to release pressure. As i puled the trigger while looking in the crack, the trigger pole moved but wouldnt pull the valve. I also need some help opening it because all the screws are imposible to get out due to rust. any help?

[Ben]

We should need some more information about the trigger problem to help with it. Please read the sticky threads here and post a response back when you get the water gun open.

We have a guide on how to open water guns that offers this suggestion for rusted/stripped screws:

If a screw is very rusted or the head has been damaged by attempts to unscrew, the only option may be to eliminate the screw altogether. A powerful drill, with a drill bit approximately the size of the screw's threads, can easily drive straight through the screw. Naturally, though, the case cannot reliably be held together at that point again.

[used man]

well the problem is that the thing that opens the valve came off its hinge. any help?