This riflescope has main tube diameter 30mm and overall diameter of the objective bell is 44mm.

• Ultra Short 243mm 9.6in, 4in Long Eye Relief, Turret Lock System, Fully Multi Coated

• 1/10MIL 1cm Adjustment, Side Focus Min from 10 Yards, w/ Honeycomb Sunshade

• 30mm Monotube, Etched Glass Reticle w/ Center Dot Illuminated, with Flip-up Caps

• A Must for Your Compact Air Guns and Light Weight Firearms, The Shortest Marksman Scope for You

• Magnification: 3-12x
• Objective Lens Dia: 44mm
• Ocular Lens Dia: 33mm
• Ocular Lens Length: 35mm
• Exit Pupil: 14.6-3.6mm
• Optics Coating: Fully-multi coated
• Field of View: 35.1-8.7 feet @ 100 yds
• Field of View: 11.7-2.9 m@100m
• Field of View: 6.7-1.7°
• Eye Relief: 90-85mm (3.5-3.4in)
• Length: 243mm (9.6in)
• Weight: 530g (18.7oz)
• Tube Dia: 30mm Monotube
• Click Value: 1/10MIL, 1cm, 0.1MRAD
• Elevation Range: 17.5MIL
• Windage Range: 17.5MIL
• Parallax Adjustment: 10 Yards to infinite
• Reticle: MPR-V10 etched glass reticle with center dot illuminated
• Finish: Black matte
• Illumination: Six gear
• Shock tested to 750g, water resistance IPX4
• Turret lock system with zero reset feature
• Fully nitrogen purged to eliminate any fogging of the lenses internally
• High quality 6061 T6 aircraft grade aluminum
• Focus mark: 10, 15, 25, 50, 100, 200 and infinite
• Diopter compensation from fast-focus eyepiece (+2 to -2)
• Accessories: one pair of 30mm weaver scope rings, flip-up caps, honeycomb sunshade and cleaning cloth etc