Here I have parts from a pt extreme pistol. I have never actually used them as they came in a spares kit and I did not require them. The ano on the lever looking part is not perfect but it is possible that this is due to the design as I have never used it so I presume that this is how it is meant to come. The other part is the bit which breaks the seal on the 12gram cartridge and I think regulates the gas flow. Look at the pictures. I'm looking for £10 including postage but feel free to make me sensible offers.
http://i979.photobucket.com/albums/ae275/talfrynf/pistolparts1.jpg
http://i979.photobucket.com/albums/ae275/talfrynf/pistolparts1.jpg