Mueller 3-9X40 Sport Dot - Red Micro Dot Riflescope

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  • Mueller Sport Dot 3-9x40 Riflescope Black
  • Mueller Sport Dot Reticle
MSRP: $199.95
— You save $30.00


Mueller 3-9×40 Scope Sport Dot Hunting

Our 3-9×40 Scope has More Features than most Red Dot Rifle scope on today’s market!

Mueller 3-9×40 Scope Sport Dot series are used primarily for the big game hunter and built to withstand the larger caliber recoils of today’s new hunting rifles. The illuminated glass etched reticle utilizes a German #4 (heavy duplex/fine post) for quick target acquisition. An 11-position rheostat to illuminate the micro-dot to aid in precise shot placement during low light conditions. All Sport Dot scope 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). All Sport Dot series scope also feature fine tune 1/8″ moa windage/elevation adjustments and are fully waterproof, fogproof and shockproof.


  • 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


Part # MU3940IGR
Eye Relief 3.25″
Length 12.60″
Weight 14.0 oz.
Tube Size 1.0″
Color Matte Black
Lenses Fully Multi-Coated
Magnification   3 – 9 × power
Objective 40 mm
F.O.V. 39 – 13 feet @ 100 yards
Parallax 100 yards
Click Value 1/8 M.O.A. (40″ @ 100yds over-all on both W/E)

E. Arthur Brown Company, Inc
4088 County Road 40 NW, Garfield, MN 56332

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Additional Information

Item Type:
Mueller Sport Dot
Ships Internationally!
Red Dot Reticle
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2 Reviews

  • 5
    Mueller 3-9×40 Sport scope.

    Posted by David F Roberts Sr. on Feb 25th 2021

    I purchased the Mueller Sport scope for my 10/22 Ruger in December. Delivery was prompt and safely packaged. Installation was made with ease and after laser bore sighting, final adjustments with live ammo were effortless. Very pleased with the construction, design and clearity of my scope. I highly recommend this scope and will purchase additional units for other rifles. Dave R.

  • 3

    Posted by JOSEPH M PARSONS on Sep 26th 2018

    I am a licensed gunsmith/dealer and have been introducing illuminated Mueller optics to customers for several years. I've been impressed with the clarity, accurate tracking of the reticles and value.Three of four purchased have continued to run great. The fourth developed a problem when the rheostat knob became very difficult to rotate and the light would not come on. The knob finally moved, under finger pressure, stripping four tiny screws attaching the knob to the tube. The wiring apparently broke during the process and the inert gas inside the tube escaped.The scope was sent back to Mueller and within two weeks a new one arrived in the mail.The illuminated Mueller optics are, in my opinion, still a great value, but as such have a weak connection at the light switch rheostat.Mueller customer service is very responsive.I would rate the Illuminated Mueller optics as a three believing a more secure and stress free light activation knob design would bring it to a five.When this particular failure occurs in the field, although the fixed reticles and dot in the scope can still be used to finish a hunt, the inert gas escapes causing moisture and subsequent fogging.

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