Patent ID: 7395819

Claim:
A compressed gas driven gun comprising: a gun body housing a cylinder comprising a piston and compressed gas chamber, wherein compressed gas stored in the compressed gas chamber fires a projectile from a barrel of the gun, wherein the piston is axially slidable within the cylinder; and a mechanical linkage adapted to prevent movement of the gun body relative to the cylinder, the mechanical linkage comprising a removable locking pin, the locking pin extendable through bores formed in the paintball marker body and cylinder, the locking pin including a handle portion extending beyond the paintball marker body adapted to be gripped by a user, the locking pin adapted to be removable by pulling the handle portion away from the body without the use of a tool; wherein the locking pin further comprises a portion that engages a button in either or both of the cylinder or gun body, wherein said engagement between the portion and button holds the mechanical linkage in place.