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

• Ultra Short 295mm 11.6" Length, FMC with Edge-to-Edge Image

• 30mm Monotube Made of 6061 T6, First Focal Plane Rifle Scope

• True 4x Zoom Factor from 6 to 24 Magnification, Side Focus Min @ 10 Yds

• Precise 1/10MIL Adjustment w/ Turret Lock Feature, Total 14.5MIL

• Light Weight, Long Eye Relief, MIL & CM MPR-4 Etched Glass Reticle

• Designed for Real Fire Caliber, All Fields of Application for Hunting, Sporting & Competition

• w/ Scope Rings, Honeycomb Sunshade, Flip-Up Caps & Cleaning Cloth

A Must for Your Compact Air Guns and Light Weight Firearms,

The Shortest Marksman Scope for You

• Magnification: 6-24x
• Objective Lens Dia: 44mm
• Ocular Lens Dia: 33mm
• Ocular Lens Length: 35mm
• Exit Pupil: 7.3-1.8mm
• Optics Coating: Fully-multi coated
• Field of View: 17.5-4.3 feet@ 100 yds
• Eye Relief: 90-85mm / 3.5-3.4"
• Length: 297mm / 11.7"
• Weight (net): 580g / 20.5oz
• Tube Dia: 30mm Monotube
• Click Value: 1/10MIL, 1cm
• Elevation Range: 14.5MIL
• Windage Rang: 14.5MIL
• Parallax Adjustment: 10 yards to infinite
• Reticle: Etched glass MPR-4
• Finish: Black Matte
• Illumination: N/A
• The distance between objective lens part and middle turret: 50mm (2.0 inches)
• Length of middle turret part: 37mm (1.4 inches)
• The distance between middle turret part to power ring: 30mm (1.2 inches)
• Shock tested to 750g, water resistance IPX4
• Fully nitrogen purged to eliminate any fogging of the lenses internally
• Turret Lock System, pull up for adjustment, press down for lock
• High quality 6061 T6 aircraft grade aluminum
• Focus mark: 10, 15, 25, 50, 100, 200, 500 and infinite
• Diopter compensation from the fast-focus eyepiece (+2 to -2)
• Including items: one pair of 30mm weaver scope rings, flip-up caps, honeycomb shade, and cleaning cloth, etc.