The EOTech XPS2-0 Holographic Sight features 0.5 MOA adjustment per click (1/2" at 100 yards) and transmission holography, parallax-free optics that are sealed to prevent fogging. With its short base design, the sight requires no more than 2-3/4" of rail space and mounts to 1" Weaver or Picatinny rails (not included). The Heads-Up display features an antiglare coating and is made with 1/8" solid glass front and shatter-resistant laminate rear windows. EOTech XPS2-0 Holographic Sight - Scopes at Academy Sports