Nighthawk Custom has an innovative system that allows pistol shooters to switch back and forth between iron sights and red dot sights seamlessly and quickly. Called the Interchangeable Optics System or IOS, it’s a longitudinally dovetailed plate installed on the rear of a 1911 slide.
Formerly the IOS was available only on new Nighthawk builds, but the company recently announced it would now install the IOS on existing 1911 and 2011 slides from Nighthawk, Kimber, Springfield, Colt and other slides that use a Novak-style sight cut.
It’s an ingenious design. Simply loosen the set screw on the top of the IOS, drive out a pin and withdraw the IOS plate to the rear. Because the dovetail is tapered, when you switch back and forth between iron and red dot, your zero is maintained.
These fully machined IOS plates are currently offered for Trijicon RMR, Shield RMSc and Vortex Viper red-dot footprints. Email CustomShop@NighthawkCustom.com for more information.