I'd like to learn to repair it and I've done so with paintball guns but I'm afraid I'll take this apart and either break off an irreplaceable piece or permanentely screw it up beyond repair.
I dont see any fine print on the box. The gun has a serial number (which could hold build date information) as well as the model number. I scoured everything it came with to find a date so far.
When I pull the lever back the trigger moves slightly back and it does c0ck itself. It's been a months since I found it and tried using it but if I remember right, when it's fired, the BB just sort of rolled out or went about 1ft then dropped off.