What Nerf gun is this? PLEASE HELP!?

I have a nerf gun, I've had it for a while. CanIt't remember how I got it, but I want to get some new bullets for it. I've looked everywhere I can't seem to find even a picture of it. None of the new bullets fit it, they're all too small. It says 2003 on it, it's a small hand gun, blue with a sort of green armor on it. It has an orange thing coming out of the back of it that you pull on to build up air inside, click it into place, and pull the trigger to release the bullet. It has two holes for extra bullets. I believe it came with darts that are sticky at the end, yellow with purple ends. I've looked at several "complete" nerf gun lists but none have my gun. Help please? I tried using other bullets but none fit, the barrel is too wide. Thank you!