This EOTech EXPS2 Holographic Weapon Sight offers true 2-eyes open shooting. The increased height provides iron sight co-witness access in the lower third of the viewing window. Plus, it also provides easy to adjust side buttons and a quick detach lever. Their most popular reticle offered, the 68 MOA ring with 1 MOA dot provides three usable aiming points. The aiming points above are based on the following load: .223 cal. 62 gr. 2,900 vel. When using other loads and calibers, the operator will have to establish the ranges associated with the aiming points. When using a shotgun, the 68 MOA ring can be used to represent shot patterns but will vary based on choke and shell selection. For ordering this reticle, the model codes will end in -0. Demo may or may not include accessories. Included in the box: HWS EXPS2(TM) Quick-Start Guide Warranty Card CR123 Battery Protective Case