When compared head-to-head with high-grade delrin, the ZF Bolt showed no wear after 20,000 cycles, whereas the delrin showed numerous wear marks all over the bolt.
Made from a space-age material that will not swell in heat, this bolt is super-slick and low-wearing. It has been designed with speed in mind resulting in its ultra-short profile. Integrated o-rings help to prevent air loss and increase efficiency and velocity.
Angled inlet hole and high-flow design results in the best bolt for your gun. Period.
The Bonebrake ZF Bolt is older, so while it may be available used and in a few cases new, it is not commonly available anymore.