*Comes with a Picaitnny mount*it is possible to install this mount without the use of a Gunsmith,*Huracan RD3-006 Green Dot Reflex Sight. The on/off switch is located at the front of the sightAde Advanced Optics first made its appearance in the firearms accessory industry by doing private label production for several major manufacturers and retailers. During this period, Ade Advanced Optics began receiving requests from numerous customers for access to the affordable, high quality products that Ade Advanced Optics was capable of producing. In 2010, by soliciting feedback from both clients and end users, Ade Advanced Optics was able to overcome the challenges a new company often faces when entering a global market and industry, especially one as competitive as the shooting, hunting, and outdoors industry.