Nikko Stirling Mountmaster 4x40 AO Rifle Scope

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Product Details

The Nikko Stirling Mountmaster 3-9x40 Riflescope with 3/8” match mounts is competitively priced and rugged enough to stand up to real use.

Your Mountmaster scope from Nikko Stirling features fully multicoated lenses, is shock tested and dry-nitrogen purged, ensuring it is fully water and fog proof for guaranteed performance, whether you are on a hunt or at the range.

Built with a very strong 3/8-inch dovetail mount ring, Nikko Stirling have added a recoil stop screw that allows the mount to be secured to powerful airguns without fear of shifting under the sharp recoil of the spring release.

Featuring 1/4” MOA finger adjustable windage and elevation turrets and an accurate 3/8” match mount and Nikko’s own HMD mil-dot reticle, you’ll be making accurate shots at varying distances over and over again with your new Mount Master scope.

If you’re looking for an affordable scope for your air rifle of .22, then look no further than the Mountmaster from Nikko.

Nikko Stirling Mountmaster 3-9x40 Riflescope with 3/8” match mounts


  • Fast focus ocular lens
  • 1 inch matte black alloy body tube
  • HMD mil-dot reticle
  • Multicoated lenses
  • Waterproof, fog proof, shockproof
  • 1/4” MOA adjustments
  • Coin slot adjustments
  • 3/8” quick detachable mounts


  • Magnification - 3-9x
  • Objective lens diameter - 40mm
  • Field of view (at 100m) - 9x - 4.3m, 3x - 13m
  • Click value (mm at 100m) - 7mm
  • Maximum MOA adjustment - 30 MOA
  • Eye relief - 9x - 75mm, 3x - 75mm
  • Tube diameter - 1 inch
  • Length - 311mm
  • Weight - 271g
  • Parallax - 91m
  • Reticle - HMD

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