Eotech Holographic Weapon Sight Md: 516A651 . Buttons on left side of sight (not in back) to work specifically with magnifiers, CR123 Lithium batteries Adjustment (per click): 0.5 MOA (1/2-Inch at 100 yds), Adjustment Range: +/- 40 MOA travel Non night vision compatible model Reticle: 65 MOA ring with a single 1 MOA dot, Raised 7 millimeter base with knurled cross bolt, Interfaces to 1-Inch Picatinny (MIL-STD-1913) rail