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Questions & Answers
How big is the dot in the scope center Manufacturer Answer

Hi, the center dot is 0.89MOA. Thanks!

by Mueller Optics, Manufacturer, August 28, 2025
Where is this scope manufactured? Expert Answer

It is made in China.

by Jonathan D., Gear Expert, March 26, 2020
Customer Reviews
Helpful Positive Review
Best scope in it's price range by Legacy Reviewer, Verified Owner, June 29, 2013
I had very good experience with the Mueller Optics 4.5-14x40mm AO APV Black Riflescope, which I mounted on my Savage Mark II. Now I looked out for a scope particularly suitable for a H&R Handi Rifle .243 Win. It should not be more expensive than the ...
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7/7 found this helpful
Helpful Positive Review
I've had this scope for ~6 months now. Initial impressions of quality and clarity were high, and remain so. Starts to lose clarity at edges around 8x but still good. At about 3x-7.5x it's comparable to the glass on my older Leupold Vari-X III 1.5-5...
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4/4 found this helpful
Helpful Positive Review
Great Value by Bryan, Verified Owner, January 5, 2015
The clarity and light-gathering capabilities are very good & the illuminated reticle is a great feature. The only feature lacking is adjustable parallax. Targets are a bit fuzzy at 25 yards when siting in, but clear enough to get the job done. Muel...
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1/1 found this helpful
Helpful Positive Review
Awesome scope! by Legacy Reviewer, November 18, 2011
Clean a good size buck with this scope and it was so easy and clear to see it. Im buying another Mueller scope for my other rifle. I highly recommend this scope! Pros: Very crisp clean scope with nice red dot for easy targeting Cons: none
6/8 found this helpful
Helpful Positive Review
Great scope by smallfry, October 17, 2014
I was fighting between getting this or the redfield revolution. I finally went with the mueller. When I got it I was very happy with the glass, it is very clear over the hole lense. I stuck it on my new Savage/Stevens 200 7mm rem. mag. and it has per...
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1/1 found this helpful
Helpful Positive Review
Mueller Optics 3-9x40mm sport dot by Steve, September 10, 2014
This product seems very good, mounted well on a lever action 30-30 and is easy to use and is accurate. I recommend it to anyone who wants a decent scope but does not shoot that often and does not need to spend several hundred dollars.
1/1 found this helpful
Read All 11 Reviews
Reticle: German #4 Tube Diameter: 1 inReticle Focal Plane: Second Focal Plane (SFP) Illumination Color: Red Finish: Matte Color: Black Weight: 14 ozAdjustment Click Value: 1/8 MOAAdjustment Type: MOA Parallax: 100 ydsIllumination Type: LED Condition: New

Code: 5M-RS-PLSY-MU3940IGR

MPN: MU3940IGR

UPC: 857727001069

List: $199.95Save 15%
$169.95

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Product Info for Mueller Optics 3-9 x 40mm Sport Dot Series Water Proof Rifle Scope

Mueller Optics 3-9 x 40mm Sport Dot Rifle Scope MU3940IGR is best used primarily for the big game hunter to withstand the larger caliber recoils of current hunting rifles. The illuminated glass etched reticle of the Mueller Optics Scope utilizes a German #4 for quick target acquisition. There's also an 11-position rheostat to illuminate the micro-dot to aid in precise shot placement during low light conditions. All waterproof Rifle Scopes by Mueller Optics in the Sport Dot Series also feature fully multi-coated optics for maximum brightness and contrast, a fast focus eyepiece for quick reticle clarity adjustments, and easy finger adjustable target style turrets (no tools required).image

Mueller Optics offers premium innovative rifle scopes that feature unparalleled craftsmanship and accuracy at a fraction of the price. If you are looking for outstanding clarity, light capabilities and more, then check out the Mueller Optics Rifle Scopes section of our store. We also have Rifle Scope accessories for Mueller Optics Scopes. They can be found in the Mueller Rifle Scope Accessories section as well.

Specifications for Mueller Optics 3-9 x 40mm Sport Dot Series Water Proof Rifle Scope:

Manufacturer: Mueller Optics
Objective Lens Diameter: 40 mm
Magnification: 3 - 9 x
Reticle: German #4
Tube Diameter: 1 in
Reticle Focal Plane: Second Focal Plane (SFP)
Exit Pupil: 4.44 - 13.33 mm
Illumination Color: Red
Finish: Matte
Field of View, Linear: 13 - 39 ft at 100 yds
Eye Relief: 3.25 in
Color: Black
Weight: 14 oz
Adjustment Click Value: 1/8 MOA
Length: 12.6 in
Adjustment Type: MOA
Parallax: 100 yds
Illumination Type: LED
Battery Type: CR2032
Width: 1.87 in
Height: 1.87 in
Lens Material: Crystal
Water Resistance Level: Waterproof
Shockproof: Yes
Fogproof: Yes
Battery Quantity: 1
Magnification Type: Variable
Condition: New

Features of Mueller Optics MU3940IGR 3 - 9x 40mm Sport Dot Series Waterproof Rifle Scope

  • Euro Coated: Fully multi-coated camera-quality crystal lenses for superior brightness and contrast; green coating
  • Large diameter ocular lens for wider field of view
  • All-weather, high-torque power change ring
  • Fast-focus eyebell
  • Eleven (11) dot brightness intensity settings
  • 1/8-inch fine-tune, windage and elevation adjustments with audible click stops and easy fingertip turrets; no tools required
  • Overall length: 12.6"
  • 1" tube construction with matte black finish to minimize glare
  • Nitrogen-filled, water-proof, fog-proof and shock-proof
  • Parallax Setting 100 Yards
  • Battery Type CR2032
  • Limited Lifetime Warranty

Package Content

  • Mueller Optics 3-9 x 40mm Sport Dot Rifle Scope w/ German #4 Illuminated Reticle MU3940IGR

Mueller Optics 3-9 x 40mm Sport Dot Series Water Proof Rifle Scope Orderable Models

List of Orderable Models

  • Mueller Optics 3-9x40mm Sport Dot German #4 Reticle Rifle Scope MU3940IGR , MPN: MU3940IGR , UPC: 857727001069 , Code: 5M-RS-PLSY-MU3940IGR

Mueller Optics 3-9 x 40mm Sport Dot Series Water Proof Rifle Scope Unavailable & Discontinued Models

List of Unorderable Models

  • Open Box, Dealer DMO, Mueller Optics 3-9x40 Sport Dot Rifle Scope MU3940IGR , MPN: MU3940IGR-DMO , Code: 5M-RS-PLSY-DMO
  • DEMO, Mueller Optics 3-9x40mm Sport Dot German #4 Reticle Rifle Scope MU3940IGR , MPN: MU3940IGR-DEMO , Code: 5M-RS-PLSY-MU3940IGR-DEMO
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