Holosun Elite HE403B-GR MicrodotHE403B GR is a 20mm micro sight designed for rifle and carbine applications. HE403B GR features Holosuns Green Super LED with 50k hour battery life, 10 daylight and 2 night vision compatible reticle intensity settings. Its housing is made from 6061 aluminum and includes both a lower 1 3 co witness mount (1. 63) and a low mount (. 75) for low comb height rifle applications. Additional features include Shake Awake technology, digital buttons for setting