Nikon Prostaff Rimfire ii 3-9×40 Review – Is It The Best Scope Out Now?

A considerable number of range shooters and hunters still prefer rimfire calibers for their accuracy and enhanced user experience. However, you need to enhance the accuracy of such a rifle with the best rifle scope, such as the Nikon Prostaff Rimfire II 3-9 x 40 scope.

This high-quality scope has been proven to perform just as advertised. Not only will the scope boost your visibility in an array of environments, but it will also improve your accuracy for long-range shooting. The unit was primarily designed for use on the .22 LR and features the renowned BDC 150 reticle by Nikon.

Additionally, it is packed with an assortment of features as well as adjustable settings, as you will learn throughout this Nikon Prostaff Rimfire II 3-9 x 40 review.

Why Buy the Nikon Prostaff Rimfire II 3-9X40 Scope

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Nikon Prostaff Rimfire II 3-9 x 40 Specs

Here are a couple of specifications that make this Nikon rifle scope stand out from the rest:

  • Tube diameter: 1 inch
  • Magnification: 3X to 9X
  • Objective lens diameter: 40 mm
  • Exit pupil: 13.33 mm
  • Relief focal plane: Second Focal Plane (SFP)
  • Eye Relief: 3.6 in
  • Adjustment range: 80 MOA
  • Parallax: 50 yards
  • Field of view: 11.3 – 33.8 ft. at 100 yards.
  • Lens material: glass

Other Nikon ProStaff Scope Models

Nikon Rifle Scope Model
Exit Pupil
Field of View
Nikon ProStaff 3-9 x 40
3 – 9 X
4 – 13.33 mm
33.8 ft. @ 100 yards
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Nikon Prostaff Rimfire II 4-12X40 Scope BDC 150
4 – 12 X
4.6 – 16 mm
33.8 ft. @ 100 yards
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Nikon 6729 ProStaff 4-12 x 40 Black Matte Riflescope (BDC)
4 – 12 X
3.3 – 10.33 mm
 23.6 feet @ 100 yards (4x), 7.3 feet @ 100 yards (12x)
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Nikon ProStaff 2-7 x 32 Black Matte Riflescope (Nikoplex)
2 – 7 X
4.6 – 16 mm
33.4 ft. @ 100 yards
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Nikon PROSTAFF 5 BDC Riflescope, Black, 3.5-14x40
3.5 - 14 X
2.9 - 11.4 mm
7.2 - 28.6 ft. @ 100 yards
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Nikon ProStaff Rimfire II 3-9 x 40 Top Benefits

  • Delivers excellent accuracy due to its Spot-on Ballistics compatibility
  • Versatile enough for range shooting or hunting applications
  • Spring-like auto zero torrents for faster, and easy settings
  • Easy, and simple Magnification adjustments to between 3X and 9X
  • Features multicolored optics for optimal light transfer
  • Backed by a lifetime manufacturer warranty

Possible Drawbacks

Several users have expressed concerns over the usability of the magnification setting knob of the scope. Again, the scope did not come with a mounting ring and may require you to purchase one separately, which will cost you more.

Nikon Prostaff Rimfire ii 3-9×40 Features and Capabilities

Nikon Prostaff Rimfire ii 3-9x40 Features and Capabilities

Just like the other rifle scopes in the Nikon Prostaff range, the ProStaff Rimfire II 3-9×40 scope boasts of a myriad of functional capabilities. For instance, it features Spring-Loaded Instant Zero-Reset turrets and ¼-inch at 50-yard adjustment intervals.

Discussed below are other aspects that make the ProStaff Rimfire II 3-9×40 one of the best:

Spot-On Ballistic Match

The Nikon Spot-on ballistic solution comes in the form of a PC software and a mobile App. Just as is the case with other rifles copies by the manufacturer, the prostaff rimfire II scopes are optimized for use with Nikon Spot On™ technology.

This technology is primarily meant to help you discover the various aiming points on your scope’s reticle at various yardages for your specific ammunition and load. The software will save you a considerable amount of time while searching for the right ammo for use with the scope.

Nikon BDC 150 Reticle

Nikon BDC 150 ReticleThe Nikon BDC 150 reticle incorporates a trademark ballistic drop compensator (BDC) .22 LR. This reticle was specifically designed with the rimfire in mind, facilitating accurate, and precise long-range shooting. The retina offers an amazing range of 150 yards.

Additionally, the unit features parallax settings of up to 50 yards, allowing you to easily close in on any long-range target with unmatched precision. The BDC reticle has unique see-through circles that have Ben proven to give shooters a vantage point while making long-range shots.

Even so, this reticle is designed to allow for a normal sight picture while shooting at a shorter range. In this case, the scope applies the crosshair as the aiming point to make short-range shots that are just as accurate as long-range shots.

Consistent Eye Relief

Tunnel vision in Prostaff rimfire II scopes simply refers to the scope clarity of the unit. As you can imagine, only a clear scope will allow you to see images and targets clearly. To allow for this, the prostaff rimfire II scopes are meant to exhibit the best light-gathering characteristics even in outdoor, dark or natural lighting conditions.

The eye relief distance on this scope is a generous 3.6 inches. Such a long relief will not only give your clear vision of your targets but will also protect the eyes. Such a capability has been proven to protect the brow whether you are using a lightweight rifle, the heaviest recoil cartridges or just shooting at difficult angles.

Instant Zero-Reset Turrets

Nikon ProStaff Rimfire II 3-9 x 40 Top Benefits

This feature was incorporated into the scope to simplify field adjustments for you. This feature makes it relatively easy for hunters to lock into any target.

With this feature in your scope, you only need to sight in like usual, tweak the spring-loaded adjustment knob, rotate the knob to your zero, and ultimately re-engage.

As a matter of fact, this scope makes field adjustments so easy that you may compare it to dialing-in your subsequent ranges


Magnification is one of the important considerations you need to make while shopping for a good rifle scope. As compared to other scopes within its price range, the magnification power of the Nikon Rimfire II 3 9×40 rifle scope is remarkable.

As the name indicates, the magnification power of this Nikon scope is classified as 3-9×40. In this case, the 40 refers to the lens diameter, which is 40 mm. The magnification power of the lens is variable, allowing you to set the magnification between 3X and 9X.

As such, this scope will give you clear images regardless of your preferred zoom level. According to hundreds of its current users, this scope gives clear images of the target, even when used at full zoom. As a matter of fact, it will give you clear images of objects as far as 50 yards away.

Fully Multicoated Optical System

The entire optical system on this rifle scope is multicolored. As such, it allows for up to 90 percent lift transmission through the optical scope. Such a performance is often characterized by the clarity, and optimal image brightness offered by the Nikon ProStaff Rimfire II 3-9×40 scope.

The superior image sharpness offered by the scope may also b attributed to its multicoated optical system. This makes the scope versatile, allowing you to effortlessly use it at virtually any time of day from dawn to dusk without impairing its accuracy.

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Why Buy the Nikon Prostaff Rimfire II 3-9X40 Scope?

The new PROSTAFF RIMFIRE II is the perfect optic for long-range guns. For instance, the scope is best suited for use on AR 15, Ruger American .22LR, Mini 14, and Remington 700 BDL 30-06 rifles.

Some users have also reported mounting the scope successfully on Tikka T3, and H&R (NERF) rifles. Regardless of the gun, most of its users are satisfied with the clear, and powerful glass lens as well as easy settings and versatility.

Whether you are a range shooting enthusiast or a seasoned hunter, you will find the Nikon ProStaff Rimfire II 3-9 x 40 to be a great rifle scope.

Top10Reviewer Team

The staff over at is composed of outdoors enthusiasts, who often enjoy testing out various audio equipment, tools, and other fun and useful gadgets.

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