Ready for your hi-capa airsoft handgun from RedWolf Airsoft... "Designed specifically for Hi Cap type pistols, RD Dynamics brings you an extremely robust reflex sight. Made to reduce and eliminate variances in targeting by the blowback action of your pistol, the RD Dynamics Reflex Sight ensures your shots hit your target each and every time. Ideal for competition shooting. Requires modifications to be made to the frame of your pistol, and thus Redwolf recommends that your first installation be done by a professional smithy."