Barska Excavator Scope 4-16 x 50IR AC10554: * Model AC10554 * 4-16 power * 50mm objective lens * Target dot illuminated reticle * Exit pupil: 12.5-3.1mm * Eye relief: 3.5" * Tube diameter: 1" * Click value: 1/8" * Finish: black matte * Weight: 20.8 oz. * Length: 14.6"