Holosun HE403C-GDThe HE403R GD (Gold Dot) is a 20mm micro sight designed for rifle and carbine applications. HE403R GD features a Rotary switch to select reticle intensity, Holosuns Gold Super LED with 50k hour battery life, and a 2MOA dot with 10 daylight and 2 night vision compatible reticle intensity settings. The HE403R GD housing is made from durable cast aluminum and includes both a lower 1 3 co witness mount (1. 63) and a low mount (. 75) for low comb height