Replaces the adjustible rear sight.
C-More (STS, RTS2), Vortex (Razor, Venom and Viper), Fastfire (I, II and III), JPoint/Optima 2000
The rear sight on the GP100 is the same but the rear sight cut on some GP100's will require machining the rear of the scope mount to allow alignment with the hole in the gun. This is a critical contact point, and a Gunsmith is recommended.
