Not too long ago I reported on RJP's "Claw Sights" (https://kitup.military.com/2012/10/claw-sights-handgun-handed-manipulation.html). Some reviews are not appearing. Here's one from Loose Rounds.
"...I ran the sights through some various lighting conditions indoors. The sights were easy to pick up in the different lighting conditions and provided a nice sight picture. The Claw rear sight provided a nice flat silhouette for the front sight. I ran the sights with and without a weapon light as well.
One advantage of the AmeriGlo ProGlo front sight is the photo luminescent ring around the tritium post. Simply hit the front sight with your handheld light and the photo luminescent ring glows brightly for several minutes -five (5) to ten (10) minutes on average. Sunlight also charges the photo luminescent ring, making transitions from outdoor to indoor environments smooth on the front sight picture. This feature provides huge advantages to a law enforcement officer engaged in clearing a building or home in changing light conditions. I found the front sight was highly visible in most of the lighting transitions...
The main concept of the Claw EMS rear sight is for one-handed racking of the slide. The name of the sights makes you ask, what is emergency manipulation? It’s a situation where you are actively in a gun fight, you have been hit, and you only have the use of one hand. How are you going to clear a malfunction or do a reload? This is a scenario that law enforcement officers train for but is often overlooked in the citizen concealed carry world. In a dynamic rapidly developing incident, you want to make sure you are not going to fumble around when it counts. The claw/hook design positively grips your gear, belt, holster, magazine pouch, pockets, and clothing providing assistance when racking the slide one-handed. As always, muzzle awareness in very important when applying these techniques, as well as proper trigger finger placement along the frame..."