A demo video about the APS Hawk Flip-Up Back Up Sights for use in airsoft is shown here by Matt in this Evike TV episode. This is made of cast metal alloy construction with CNC finishing and is matte black weather resistant. This are addjustable front and rear sights with the flip up design can be deployed when needed, remains out of the way when not needed. The detent keeps sight in the deployed or stowed position and it the rear sigh is dual aperture.