US Patent 7246511 Cable gunlock

A cable gunlock including a lock case with longitudinal bores receiving a fixed shackle and a movable shackle. The movable shackle includes a spring threaded on its end and abutting against the outer surface of the lock case providing an automatic release. A latching member is driven in and out of cooperation with the movable shackle by a locking mechanism and is urged towards the movable shackle by a spring. The latching member has an inverted U-shape and an inclined surface ending in an inwardly cut semircularly shaped edge.