A lock for a firearm or weapon is disclosed that enables the weapon when control is established by a user while the weapon is in a storage location or holding device. The weapon remains operable as long as the user continuously remains in control but is disabled until returned to the storage location or device if the user relinquishes control. Storage and user zones are defined by weapon location or input devices such as a grip safety. Mechanical devices or signals transfer the zone determinations to a logic device. When the logic device, which may be mechanical, electronic or implemented in other way, determines that the weapon is considered to be both in the storage zone and the user zone and it causes transition to an operable state. The logic device causes transition to an inoperable state if the weapon is determined not to be in either zone.