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Questions & Answers
What does the "AO" designation in the scope description mean? Expert Answer

Please email us at techsales@opticsplanet.com so we can further answer your question.

by Ben, Gear Expert, October 20, 2021
Is this scope intended for centerfire or Rim fire cartridges? Expert Answer

This scope can do both centerfire and rimfire cartridges.

by Ben, Gear Expert, October 20, 2021
Customer Reviews
Helpful Positive Review
Solid Product at a great price by Chav, March 10, 2020
This is a solid product at a great price. Used indoors for .22 LR CMP matches where the AO is helpful. It came with rings which is a nice plus. I used a Simmons 22 Mag previously and this is a step above.
5/10 found this helpful
Read 1 Review
Objective Lens Diameter:
40 mm
Magnification:
3 - 9 x
Reticle:
1/4 MOA
Tube Diameter:
1 in
Reticle Focal Plane:
Second Focal Plane (SFP)
Exit Pupil:
4.4 - 13.3 mm
Finish:
Matte
Field of View, Linear:
4 - 11.9 m at 100 m
Eye Relief:
3.3 in
Color:
Black
Weight:
380 g
Adjustment Click Value:
1/4 MOA
Length:
12.7 in
Adjustment Type:
MOA
Parallax:
10 yds to infinity
Illumination Type:
LED
Adjustment Range:
30 MOA
Lens Material:
Glass
Optical Coating:
Multi-Coated
Weather Resistance:
Yes
Water Resistance Level:
Waterproof
Shockproof:
Yes
Fogproof:
Yes
Magnification Type:
Variable
Condition:
New
Mount Type:
Weaver

Code: 1YQ-RS-39X40AORS-NMM3940AON

MPN: nmm3940aon

UPC: 9420001435372

Product No Longer Available

Product Info for Nikko Stirling Mountmaster 3-9x40 AO, 1in Tube Rifle Scope, Second Focal Plane

All our tried and proven Mountmaster scope series are competitively priced and are rugged engouh to stand up the real us.image

Features of Nikko Stirling Mountmaster 3-9x40 AO, 1in Tube Rifle Scope, Second Focal Plane

  • 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, 1in Tube Rifle Scope, Second Focal Plane
  • Lens Cover
  • Lens Cloth
  • Manual

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Nikko Stirling Mountmaster 3-9x40 AO, 1in Tube Rifle Scope, Second Focal Plane Unavailable & Discontinued Models

List of Unorderable Models

  • Nikko Stirling Mountmaster 3-9x40 AO, 1in Tube Rifle Scope, Second Focal Plane, HMD Reticle, 1/4 MOA, Matte Black, NMM3940AON , MPN: nmm3940aon , UPC: 9420001435372 , Code: 1YQ-RS-39X40AORS-NMM3940AON
  • Nikko Stirling Mountmaster AO Rifle Scope, 3-9x40mm, 1 inch Tube, 1/4 MOA, HMD Reticle, Clam Pack, Black, NMM3940AOWC , MPN: NMM3940AOWC , UPC: 682146852035 , Code: 1YQ-RS-39X40AORS-NMM3940AOWC
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