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The second focal plane Side Focus TMR reticle maintains a consistent appearance across the magnification range. This allows for faster target acquisition and improved accuracy, especially beneficial for long-range shooting.
The 3:1 zoom ratio means that the riflescope offers three times more magnification at high power than at low power. This allows you to adjust your power down for close encounters or all the way up for long-range shots.
The ZeroStop system provides a reliable backstop when returning the elevation dial back to zero. This prevents accidental full revolutions in the wrong direction, ensuring consistent and accurate adjustments.
Yes, the Leupold Mark 3HD 4-12x40 Riflescope is compatible with Leupold's CDS. This system allows you to customize your turret to match specific ballistics and environmental conditions for on-the-fly adjustments.
The Leupold Mark 3HD 4-12x40 Riflescope is designed with durability in mind. It is waterproof, fogproof, and shockproof, able to withstand extreme temperatures, elevation changes, and the recoil of repeated shots.
Review Summary
2026-03-18T20:00:00
Mounted on a Ruger 10/22. Needed a simple but effective scope and this is what I chose.
Brant H.

2026-02-22T19:00:00
Love it!!
Aaron W.

2026-02-09T19:00:00
Awesome optic love it. . .
JEREMY K.

2026-02-04T19:00:00
This scope, I put on my 22-250 and it's perfect for coyote and bobcat hunting. It has a clear glass and functions well. I've had no issues with it.
Gerad M.

2026-01-28T19:00:00
I purchased my Mark3 HD 4-12×40 through Euro Optic. For the $600, it's a decent scope. I like the TMR-mil reticle, especially for shooting out a little further. I've had no issues getting 1st round impacts out to about 700yds (with proper info and ballistic calculator). The only complaint is you only get about 1 rotation of elevation, so I would run out of dial and move to holding over using the reticle. Still a good, clear scope.
Leakysfinkter

2026-01-10T19:00:00
Absolutely love this in the little I've used it. I have it on a 350 legend and I have hit targets out to 300 with it, and hunted in all weather conditions, zero issues.
Richard L.

2026-01-09T19:00:00
Good affordable scope. Wish their were really tactile knobs when adjusting. Like the uncluttered reticle. Prefer MOA, but mil OK. I can work with it. Coyotes beware.
Lance O.

2026-01-08T19:00:00
Exceeded expectations.
Jamie J.

2026-01-08T19:00:00
Great optic, crystal clear, Classic leupold clarity especially at dusk. only thing I wish it had a 50 mm Obj. lens.
Russell J.

2026-01-03T19:00:00
The scope is light-weight and a good deal. This is my 3rd MK 3HD.
Sergio N.

2026-01-01T19:00:00
Awesome scope!
DEAN G.

2025-12-26T19:00:00
Awesome scope for my daughters first rifle. Really impressed with the clarity of the glass and no complaints.
Michael J.

2025-12-04T19:00:00
I only put Leupold glass on my firearms. Best product for the money.
Robert S.

2025-10-24T20:00:00
Great scope perfect on Remington 700 308 with 20 in barrel. Dead on, every time, when mounted on mark 4 mounts. Clear glass and firedot makes target acquisition quick. The TMR takes the guess work out of elevation adjustments on the fly.
Charles B.

2025-10-24T20:00:00
This is the perfect blend of quality and a smart budget. You get all the quality without breaking the bank. Firedot is a must for early morning or last light hunts.
Zachary B.

2025-09-26T20:00:00
Originally I planned for this scope to be used on my Ruger Mini 14, it has since found a home on my Ruger American . 308 Win. It is a great compact scope, the 1. 5-4× magnification is ideal for woods and field deer hunting, and I really like the FireDot for fast woods sighting especially in low light conditions. Added Bonus- the BDC reticle, when sighted in @ 200 yards, gives me 300-500 yard capability if the occasion calls for it.
Scott B.

2025-09-18T20:00:00
The field of view on this scope is far more than the competitors. Super clear / bright in low light conditions
Michael C.

2025-09-11T20:00:00
Great compact scope, mounted in a 22 mag and my kids love it.
Dustin D.

2025-09-06T20:00:00
Optic is great and love the red dot aspect as it's very easy for your eye to lock on too. Almost took a star away due to not finding any info and had to contact customer support. (They where fast and friendly. ) Mounted to a 6. 5 creedmoor ruger american ranch 16 inch barrel and shot to high maxing out the turret. Just had to remove turret and adjust with a wrench than install turret at zero. Everything is good to go now.
John K.

2025-08-24T20:00:00
Good glass for the money. Reticle is a on the thick side for precision shots, but perfectly adequate for a hunting scope.
Nathan G.

2025-08-19T20:00:00
Got this scope for a Tactical scope for my Mini 14. The 'meat and potatoes' of this rifle and scope is 0-200 yards, and the BDC works out in my rifle with Frontier #FR260 with 62 gr FMJ as 310, 360, 408, 455, and 501 yards. Sure hits on 100% size IPSC silhouette steel. Love the red dot reticle for fast fast fast target acquisition, especially in low light when crosshairs can get lost in deep shadows. At 9. 5" and 13. 1 oz. complements my Mini perfectly so it stays fast handling and light weight.
Scott B.

2025-08-15T20:00:00
This scope is overkill for a 10/22 but it's my favorite. Leupold, thank you for making such a badass scope.
Bradley R.

2025-07-29T20:00:00
Great optic, extremely pleased
mike l.

2025-05-30T20:00:00
Great scope and great quality! Highly recommend leupold!
Cody F.

2025-05-27T20:00:00
It's really nice I wish I would've got more power lol I shot the heck out of rats with it on my 22
Justin D.

2025-05-23T20:00:00
Looks good, great value and the reticle isn't too busy!
Rick M.

2025-04-30T20:00:00
Variable scopes may well be popular and sell well but I am a fan of fixed power for specialized purposes. Too bad you cut back on fixed power production so I am forced to crank in a setting and keep it there. Anyhow, you continue to make fine products and I like my Leupold scope.
Kolman G.

2025-01-25T19:00:00
The red dot at the three highest setting is when it's possible to see even in a dark room at night, the hold overs are very hard to see also even when looking at the target, i own three other luepolds and they are all of high quality don't know where the quality went on this one if they won't let me return it I will put it on my grandson's Daisy Red Ryder very disappointed to say the least
Aaron T.

2025-01-03T19:00:00
Absolutely amazing optics. Need another one for my other rifle!
Michael C.

2024-12-12T19:00:00
My Mark 3HD 4-12x40 Firedot TMR ticked all my boxes for a shorter barrel . 308 bolt gun. MPVO. Very usefully illuminated. Very light weight. Mil-Dot second focal plain. MRAD turrets. Elevation good to 600m, with stop. Good glass. Good warranty and real support. Lacking a fifth star because they included the wrong size Allen for the elevation turret. Should be 1/16", not 0. 05". Also there is play in the windage before first click. And I could only get it at MSRP, which was expensive after adding their nice caps and good rings.
Dave

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Browse our FAQ
Matte Black
Side Focus
No
Second Focal Plane
P5
No
No
Set Screw
Finger Click
No
No
Second Focal Plane
TMR
Elite Optical System
Variable
No
No
No
No
No
No
Elevation: 0.1MIL
Windage: 0.1MIL
Elevation: 6 MIL
Windage: 5 MIL
5.6MIL
4-12x
40mm
Low Mag: 21.5' (6.55m)
High Mag: 10.1' (3.08m)
Low Mag: 4.9" (124.4mm)
High Mag: 3.7" (93.98mm)
1.18" (30mm)
12.6" (320.04mm)
16.2 oz (459.26g)
030317028602
Clear glass, rugged design, and
By James D.
Clear glass, rugged design, and a good choice for my 308 AR rifle.
Great short/mid range scope
By Jeffrey D.
Scope has good lense clarity and light transmission. Hash marks are right on. Overall size is great for braced pistols. Regarding Really?! review. It should read ?really dumb***?; 1 star on a premium made & backed scope, because you can?t read the specs before purchasing. People like you screw up overall ratings for others that are shopping based on 4 or 5 stars only products. For up close & fast, a good 1.5 is still fine for both eyes open.
It is with great pride that Adorama presents the Leupold Mark 3HD 4-12x40 Riflescope, a testament to our commitment to providing high-quality, durable, and reliable optics for the discerning shooter. This riflescope, finished in a sleek matte black, is engineered for precision and versatility, making it an ideal choice for mid to long-range shooting applications, whether for hunting or target shooting.
The Mark 3HD is equipped with a second focal plane Side Focus TMR (Tactical Milling Reticle), which maintains a consistent appearance across the magnification range, ensuring faster target acquisition and improved accuracy. The P5 dial with MIL-based adjustments allows for precise elevation and windage corrections, making it a top contender for shooters who demand tactical precision.
At the heart of this riflescope is Leupold's Elite Optical System, designed to deliver exceptional light transmission, reduced glare, and sharp resolution. Shooters can enjoy clear, high-definition images across all magnification levels, thanks to the calcium-fluoride lenses. The 3:1 zoom ratio offers a versatile magnification spectrum, enabling quick transitions from 4x for close-range shots to 12x for detailed long-range observation and engagement.
The exposed elevation adjustment dial is complemented by a ZeroStop system, providing a reliable backstop for returning to zero without the risk of overshooting. The side focus parallax adjustment enhances reticle clarity and minimizes perceived movement, ensuring your target is always in sharp focus, regardless of the distance.
Leupold's Custom Dial System (CDS) is compatible with this riflescope, allowing shooters to tailor their turret to match specific ballistics and environmental conditions for on-the-fly adjustments. Once the custom dial is installed, simply range your target, adjust the dial, and engage with confidence.
Durability is a hallmark of the Mark 3HD series, with waterproof, fogproof, and shockproof construction. Utilizing advanced internal gases and sealing methods, the riflescope is built to withstand extreme temperatures, elevation changes, and the recoil of repeated shots, ensuring a lifetime of moisture-free and clear optics.
The TMR reticle is designed to provide accurate subtensions and magnification, with the reticle size appearing consistent at the highest magnification setting. This feature is particularly beneficial for shooters who rely on precise measurements for bullet drop and wind drift.
In summary, the Leupold Mark 3HD 4-12x40 Riflescope is a robust and precise optical instrument, crafted with meticulous attention to detail in our Oregon factory. It stands as a reliable partner for any shooter looking to enhance their long-range shooting capabilities with a scope that is as versatile as it is accurate.