Below is my PT Extreme pistol which I dug up from 2005 when I stopped playing PB. I've currently just got back into the sport and want to get it running again. Sadly the hopper was lost so what you see is a jerry rigged PVC hopper which still needs a weak spring to feed the balls (Which I can't seem to find anywhere.) I had the gun working, but shortly after it started bursting the CO2 cartridges and I figured it was the rubber lining around CO2 intake, which seemed to be falling off. I need help fixing that part which you can see in my second picture. Any ideas? Sorry if I seem ignorant, but I'm really new to the PB Nation.