EOTECH's HWS (Holographic Weapon Sight) utilizes holographic technology to greatly reduce parallax when acquiring an off-center sight picture, allowing for a point of impact closer to the sighted in point of aim. The standard full-size option allows the sight to accommodate two AA batteries, allowing for a longer operational life. The optic also includes infrared brightness settings for use with night vision optics and comes with an 8-hour auto shutoff feature to help conserve battery life. The HWS 558 features a lower 1/3rd co-witness mounting height and comes with a QD mount for fast mounting and removal to a 1913 Picatinny rail. The reticle includes EOTech's signature 68 MOA speed ring for fast close quarters shooting paired with a 1 MOA dot for long range sighting. Two AA batteries are included.