Every tactical operator needs options when it comes to mounting accessories. Now you can position a FastFire secondary optic in nearly any radial position on your primary optic. The Scope Tube FastFire Mount allows your primary optic to remain on a higher magnification while quickly switching to the FastFire sight for ultra-fast close quarters target engagement. It's also great for long-range target acquisition and weapon alignment to then be engaged with your high power primary optic. These are the tube mounts only FastFire sight not included.