Patent ID: 8112929

Claim:
A key device having a key element for locking a hammer gun or bolt gun comprising a trigger rod which can be reciprocated by a trigger, said key element being a releasably securely attachable component of the gun housing, wherein the key element is in the form of a rear portion of the grip of the gun; wherein the key element is coupled with a movably mounted gate element having a shift gate for guiding the trigger rod, and when the key element is inserted in the gun, the gate element is in a first position, in which the shift gate of the movably mounted gate element is oriented so as to enable interaction between the trigger rod and the bolt for the purpose of cocking and releasing the bolt; and wherein the gate element is biased by a key spring such that when the key element is removed from the gun the gate element is in a biased second position in which the trigger rod is oriented so as to prevent interaction between the trigger rod and the bolt and, if necessary, to decock a cocked bolt.