Nikko Stirling Mountmaster AO IR 1in Tube Rifle Scope HMD Reticle 1/4 MOA Matte Black. Specifications for Nikko Stirling Mountmaster 3-9x40 AO IR 1in Tube Rifle Scope: Manufacturer: Nikko Stirling Objective Lens Diameter: 40 mm Magnification: 3 - 9 x Reticle: 1/4 MOA Tube Diameter: 1 in Finish: Matte Eye Relief: 3.3 in Color: Black Weight: 380 g Adjustment Click Value: 1/4 MOA Adjustment Type: MOA Parallax: 9.1 m to Infinity Illumination Type: LED Lens Material: Glass Optical Coating: Multi-Coated Weather Resistance: Yes Water Resistance Level: Waterproof Shockproof: Yes Fogproof: Yes Gun Type: Rifle Features of Nikko Stirling Mountmaster 3-9x40 AO IR 1in Tube Rifle Scope Supplied with 3/8'' mount 1 inch matte black alloy body tube AO models feature parallax adjustment on bell 10yds to infinity IR models Waterproof Shock Proof Nitrogen Filled Multicoated Lenses Package Contents: Nikko Stirling Mountmaster 3-9x40 AO IR 1in Tube Rifle Scope Lens Cover Lens Cloth Manual Nikko Stirling NMMI3940AON: Mountmaster 3-9x40 AO IR 1in Tube Rifle Scope HMD Reticle 1/4 MOA Matte Black