The Holosun HS515GM is one of the most premium optics offered by holosun. This optic features a 2 mos dot and 65 moa circle as well as 2 MOA dot standalone while using the dot only you get an amazing 50000 hours of battery life and 20000 hours of battery life when you use the circle and dot combination. This optic also features Holosun&';s shake away option which is great for battery retention. It has 10 daylight settings and 2 night vision settings. The housing of the optic is made of 7075 series aluminum with a hard anodized finish. The mount uses a quick detached lever system which makes it easy for installation. The side of the optic has the battery compartment which makes removing and replacing the battery very simple. This optic is parallax free as well as also having unlimited eye relief. The flip caps that are included on this kit also come installed with a kill flash. Included in the box is user manual,FAQ guide, lens cleaning cloth, the battery and a tool for installation.