Buy the EOTECH 558 Holographic Weapon Sight from BattleHawk Armory! The 558 is compatible with Gen 1-3 night vision devices and features an adjustable, locking, QD mount for instant removal. The operational buttons are located on the side of the sight, making this optic ideal for use with EOTech switch-to-side magnifiers. The drop-in replacement Laser Battery Caps (LBC and LBC2) are designed to work with this model as well, increasing aiming capabilities and speed to target all day and night long. Our 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. Water Resistant 33ft. (10 m) depth Mount 1" Weaver or MIL-STD-1913 rail Windage & Elevation Adjustment 0.5 MOA per click Brightness 20 daylight settings 10 additional settings for Gen I through III+ night vision devices Power Source 2 x 1.5 V AA batteries - Supports lithium, alkaline or rechargable Battery Life Lithium: 2,500 continuous hours at nominal setting 12 at room temperature Alkaline: 2,200 continuous hours at nominal setting 12 at room temperature Operating Temperature -40AdegF to 140AdegF (-40AdegC to 60AdegC) Country of Origin Made in USA