Pretty much as above, the Proto bolt kit is available for the Dye Proto. Using our patented spool valve technology, this bolt gives us well over 1600 shots from a 68/4500 fill. Slightly less parts to this since you use parts off your stock bolt.
The Evolve Paintball Proto Bolt Kit is newer, so it should be commonly available, both new and used.
Before I got this bolt I was using a stock bolt w/ 530 and top hat mod. Properly tuned I got around 5 pods and a hopper (Halo) w/ a 68/4500 tank w/ around 4300-4400 psi after the tank cooled. After I got this bolt I got 6 pods and a hopper (Halo) w/ a 45/5000 Evil Scion after the tank cooled to around 4300 psi after tuning and w/o any bolt mods inlcuding the three rings Evolve Paintball sends with the bolt! One thing I noticed was that when I put on the rings Evolve Paintball sends only two out of three went to the bottom of the tophat. I thought I wouldn't really need the last one. Sometimes the gun would shoot and sometimes it doesn't. So I would suggest not to really use it unless you can get all the rings on. If you like quiet guns I really would suggest people not to install the rings.
Improves effiency noticably
Allows user to lower LPR, Inline Pressure and Dwell
I would recommend this product to ANY back or mid players because they can always use the extra effiency this bolt gives you. It also can shoot more smoother and feels like there is less kick. I'm going to give it a 10 because it has great effiency even though it wouldn't shoot all the time w/ any of the three rings installed!