Does anyone have any idea how to put together a Daisy 400GX (looks like Desert Eagle) pistol?

Yeah, the same way it came apart>

i tried that, you insolent creep. you must be braindead or something. ive been trying to do that for three damn months now.

If you've been trying for three months, maybe he's not the only one who's brain-dead! Just kidding....just kidding.