Vector Optics Grimlock 1.75-6x32ir Rifle Scope Tactical Compact Style, Long Eye Relief, Turret Lock System, Wide Field of View, 30mm Monotube, Side Illumination, Etched Mil-dot Reticle Model: SCOC-13 Grimlock Magnification: 1.75-6x Objective Lens Dia: 32mm Ocular Lens Dia: 40mm Ocular Length: 65mm Exit Pupil: 5.3-17.1 mm Length: 280mm (11.0 inch) Weight (net): 540g (19.0 ounce ounce) Eye Relief: 89-100 mm (3.5-3.9 Inch) , long eye relief Field of View (): 17.7-61.4 Field of View (M@ 100M): 5.4-18.7 Num of Lens: 10 Optics Coating: Fully Multi Coated Reticle: Etched Glass Mil-dot Reticle Elevation Range: ± 75 MOA Windage Range: ± 75 MOA Side 11 levels red brightness illumination system 30mm Monotube Shock proof, Water Proof and Fog Proof (Nitrogen Purged) High quality aluminum alloy in durable black matte finish Feature 1/4 M.O.A direct windage and elevation adjustments with audible clicks Free Fitting involved: 30mm low weaver (default) or dovetail mount