Patent ID: 7356956

Claim:
A counting mechanism for detecting and registering the number of rounds fired from a recoil gun, said mechanism comprising: a housing, said housing having a shape and configuration for mounting to a barrel of the gun; a counting device contained within said housing, said counting device indexed by recoil action of the gun barrel upon a round being discharged; and a movable weighted mass within said housing such that relative movement between said housing and said mass results with the recoil action of the gun barrel, said counting device operably configured with said mass such that the relative movement of said mass upon discharge of a round from the barrel causes indexing of said counting device; wherein said counting device comprises an incrementing geared counter, and an actuator configured with said geared counter to cause indexing of said geared counter, said actuator operably configured with said weighted mass so as to be actuated by relative movement of said weighted mass to a defined position relative to said housing in response to the recoil action; and wherein said geared counter and actuator are movably mounted within said housing and constitute at least a component of said weighted mass.