NIUDB 3X Magnifier Scope Sight Tactical with Flip to Side 20mm Rail Mount Scopes A powerful tool to your hunting/target practice and airsoft. A perfect add-on to your red/green dot sight/ reflex sight This 3X magnifier can also be used as a handy portable monocular. 3X magnifier gives you more clear and accurate sight, a very good tool to increase field performances. The specially designed flip to side tactical mount provides very quick and easy switching sights between magnifying and non-magnifying.