The bolt is made from a nylon-like material and is lighter than even delrin. It will help increase velocity due to the lesser force used to move the bolt. The bolt has a cupped face to gently push the ball forward. No venturi means a higher flow and a better, more consistent velocity reading. No oil necessary! This bolt is "self lubricating" like delrin bolts but can take moisture and oils without the swelling!
The Bandit Bolts N-Bolt is older, so while it may be available used and in a few cases new, it is not commonly available anymore.