Holosun HS403B 2 MOA Micro Red Dot Sight (20mm)
The Holosun HS403B is a compact 20mm enclosed red dot sight built around a 2 MOA dot reticle and a CR2032 power source with up to 50,000 hours of battery life (setting 6). Brightness is adjustable with 12 settings (10 daylight and 2 night vision compatible), and the sight features a convenient tray-style battery compartment.
Factory features include Shake Awake technology, 0.5 MOA per click adjustments, and an IP67 water resistance rating. This unit includes the owner's manual and a low mount.