The RAP4 holographic sight allows for precision aiming and targeting of paintball markers.  Attaching to any standard weaver/ picatinny rail the sight has the option for either a red or green dot.  The sight can also be adjusted to project a circle and dot, circle crosshairs or crosshairs.  The small and unobtrusive size makes this sight perfect for the gunner who wants a low profile.  An offset hopper or an elbow is recommended so you can easily aim down the sights with no obstructions.