Patent ID: 8516736

Claim:
A firearm sighting device comprising: an adjustment mechanism supported by the sighting device, the adjustment mechanism configured to adjust a setting of the sighting device; and an adjustment knob supported by the sighting device, the adjustment knob comprising: an actuator in operative association with the adjustment mechanism, the actuator including an axis of rotation and an outer surface that is grippable by a user, wherein rotation of the actuator drives the adjustment mechanism to thereby adjust the setting of the sighting device; and a locking mechanism in operative association with the actuator, the locking mechanism including a first portion non-rotatably coupled to the sighting device and a second portion coupled to the actuator such that the second portion rotates about the axis of rotation along with the actuator, the second portion selectively movable between locked and unlocked positions such that when the second portion is in the locked position the first and second portions are engaged so as to restrain the actuator from rotation about the axis of rotation and when the second portion is in the unlocked position the first and second portions are disengaged so that the actuator is rotatable about the axis of rotation for adjusting the setting of the sighting device.