I have done more research into paintball guns, and I have determined that the HEAR valve is not for me. Morpherman came up with a do-able idea to make a hammer valve out of PVC, and I expanded on it here.Please look at this page to understand the design of the valve. I have made some changes in this varient, which I am tentativly calling the DSH (duel sear hammer) valve.
Also Goose_Man, SPG and me came up with a do-able helical magasine here. In theory it will be silent and have a feed rate of 20+ bps. If I can get the kinks worked out of the DSH they should be able to reach that rate of automatic fire, and be more than fast enough for semi.
Third, Ragnarok sugested a easily-buildable regulator here. Also, I may not make the outer case for the piping out of heat-molded PVC, as for the original plan. Just my luck that wh got new sideing on out house, made of thin flexable aluminum (the box said PVC, which is weird). I will probably use that not only for asthetics, but for safty and sound reduction.
I incorperated these new ideas into the shape of the Barrett XM500 .50 sniper. Enjoy. .5 MOA accuracy, here I come
![Laughing :lol:](./images/smilies/icon_lol.png)