Nikko Stirling Airking 4x32 AO 1in Tube Rifle Scope HMD Reticle 1/4 MOA Matte Black NGRA432. Airguns that use powerful recoiled springs to release air. Specifications for Nikko Stirling Airking 4x32 AO 1in Tube Rifle Scope: Manufacturer: Nikko Stirling Objective Lens Diameter: 32 mm Magnification: 4 x Reticle: 1/4 MOA Tube Diameter: 1 in Finish: Matte Eye Relief: 2.9 in Color: Black Weight: 490 g Adjustment Click Value: 1/10 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 Last Chance: Yes Features of Nikko Stirling Airking 4x32 AO 1in Tube Rifle Scope Supplied with 3/8 one pc base mount 1 inch matte black alloy body tube AO models feature parallax adjustment on bell IR (illumin.) Package Contents: Nikko Stirling Airking 4x32 AO 1in Tube Rifle Scope Lens Cover Lens Cloth Manual Nikko Stirling NGRA432: Airking 4x32 AO 1in Tube Rifle Scope HMD Reticle 1/4 MOA Matte Black