http://www.anythingxtreme.com/Tippma...8113C1383.aspx
the style of the bolt doesnt affect performance, just the way you cock it. for tippmanns because of the way they are set up, it is much easier to have it be side cocking. but they have rear-cocking kits available for them. and in tippmanns, the thing that you cock on the side is not actually the bolt, it is the hammer. the hammer is linked to the bolt through the linkage arm. and side cocking and rear cocking bolts will give you the smae performance, again, its just the way things are set up.... you could cock it from the front or the bottom and it would still have the same performance.
when looking for a new bolt, get something that is delrin or nylatron, and has no o-rings, and is also open-faced (no venturi). the only thing a venturi does is make you have bad air effeciency. if your bolt has a venturi i would recommend taking it outwhen i did thst to mine, it instantly went up 15 fps. thats a good sign of air effeciency.
as for expansion chambers, they are only for use with co2. if you have nitro an expansion chamber will probablly do more harm than good. but what it does to co2 is give it a little extra space before going into the gun to expand from a liquid into a gas. this helps with consistency and is also better on moving parts and o-rings in your gun, so it isnt just for looks.
COCKING BOLTS + questions
