Safety, Ambidextrous Thumb, Blue. Fits: A thru O Pkg. Includes: Safety The High Ride Ambidextrous Thumb Safety provides a comfortable thumb rest for shooters who prefer to shoot with a high thumb. Both sides of this safety are extended, wide and angled downward for greatly enhanced shooter comfort, while allowing rapid action of the safety. This is also an excellent choice for lefties looking for a slightly wider lever on the right side of the gun.