NightForce ATACR 5-25x56mm F1 ZeroStop .1 Mil-Radian DigIllum PTL Mil-R, Black, 34mm Internal Adjustments: Elev- 89MOA/26 MIL, Wind-60MOA/ 18MIL Tube Diameter: 34mm Eye Relief: 3.54" Mounting Length (inches/mm): 6.3/160 Weight (ounce/gram): 30/850