From DocPop: This updated Bolt, also known as the BoltXP, has the same shape and feel as the classic Bolt from the 2000s, but with a few small updates to improve play.

The Bolt is made from machined POM (very similar to delrin) and features schmoove grooves. The caps are removable. It comes unresponsive, with a C bearing installed, but you can put in a half-spec bearing for responsive play.