Mark 4 ER/T 6.5-20x50mm (34mm) M5A2 Locking Adj.

Designed and engineered with the military sniper in mind, Leupold quickly responded to the need for a second generation of precision long-range riflescopes with the Mark 4 Extended Range/Tactical.

Model Options Starting prices are USA only, and are our Suggested Retail Price.

Downloads

  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getContent, 242.5ms
  • REVIEWS, PRODUCT
  • bvseo-msg: HTTP status code of 403 was returned;

Xtended Twilight Lens System

Now your hunt can reach further into the twilight than ever before possible, with our exclusive new Xtended Twilight Lens System™. It goes a step further than even the Index Matched Lens System®, using Leupold’s® index matched glass with wavelength specific lens coatings designed to optimize the transmission of low-light wavelengths. When most scope manufacturers quote percentage of light transmission, they usually mean at 550 nm, the green wavelength where the human eye is most sensitive. The challenge is that in twilight conditions, green light disappears and blue/violet light takes over. Your eye is already handicapped when it comes to seeing the blue/violet spectrum, and if your scope is cutting too much of it out, soon you won’t be seeing anything. The Xtended Twilight Lens System places extra emphasis on matching coatings to glass indices to achieve the best possible transmission of the blue/violet spectrum, without sacrificing the color balanced light transmission across the visual spectrum of the Index Matched Lens System. When we combine that with superior computer-generated optical design, lead-free lenses of unsurpassed clarity and quality, and 100 years of manufacturing excellence, you have a scope that gives you the details of low-light scenes in greater definition and luminance than any other scope in the world.

DiamondCoat 2

Exterior lens surfaces are treated with DiamondCoat 2™, an ion-assist lens coating, for higher light transmission and the greatest level of abrasion resistance we’ve ever offered. DiamondCoat already exceeds military standards for hardness and durability. DiamondCoat 2 offers unsurpassed durability and will prove its worth in the wildest places on earth. DiamondCoat 2 has the additional advantage of assisting in light transmission, for greater brightness, clarity and contrast.

2nd Generation Argon/Krypton Waterproofing

While we still waterproof other optics with bone-dry nitrogen – technology pioneered by Leupold® – Select models feature our exclusive, proprietary Argon/Krypton gas blend. Its advantages are two fold: it nearly eliminates the effects of thermal shock, and the Argon/Krypton molecules are significantly larger than nitrogen molecules, reducing the diffusion of gases sealed inside your scope even more than our proven nitrogen technology already does. We pioneered riflescope waterproofing, and now with Argon/Krypton we’re exceeding the standards we set ourselves.

Generous Eyebox

The generous eyebox makes it faster and easier to get your eye behind the riflescope and achieve a full, clear sight picture. Setting up for longer shots you'll appreciate the flexibility it affords, and in close up big game or dangerous game situations the quick target acquisition will be the difference maker. At high power, the longer eye relief and more generous eyebox gives you incredible head position latitude and an improved sight pictue that fills the eyepiece completely - putting you in better position to make the shot of a lifetime.

Blackened Lens Edges

Blackened lens edges reduce unwanted glare and diffusion through the lens edges to provide better resolution, improved contrast and superior optical perrformance.

Twin Bias Spring Erector System

Super Fast-Focus Eyepiece

Lockable Fast-Focus Eyepiece

3:1 Zoom Ratio

Dual Use

Outstanding accuracy, legendary ruggedness, and absolute waterproof integrity. All Leupold® optics offer performance that makes them equally at home in hunting or tactical environments. Leupold Long Range/Tactical riflescopes are excellent choices for both long-range hunting and varminting. Likewise long-range competitive shooters and members of the Fifty Caliber Shooters Association – men and women who shoot competitively at ranges of 600 yards or more – rely on the accuracy and durability of these scopes. See overview of each product for more detailed information on hunting, shooting, and competition applications.

1/4 MOA Target

M1 Adjustments

M2 Adjustments

30mm Maintube

3rd Generation Illumination

Side Focus

M3 Adjustment

M5 Adjustments

Custom Shop serviceable

Tactile Power Selector

34mm Maintube

M5A2 Adjustment

6061-T6 Aircraft Quality Aluminum

Flip Back Lens Covers (Mark 4)

Front Focal Plane (FFP)

The reticle magnifies along with the image, so you can estimate range at all magnification settings. These reticles are ideal in tactical situations, yet also provide greater accuracy of range estimation for hunters and target shooters.

Specification Low High
Actual Magnification 6.50 x 20.00 x
Linear Field of View (ft/100 yd) 14.30 ft 5.50 ft
Linear Field of View (m/100 m) 4.80 m 1.80 m
Eye Relief (in) 4.40 in 3.60 in
Eye Relief (mm) 111.00 mm 93.00 mm
Specification Value
Weight (oz) 30.90 oz
Weight (g) 876.00 g
Objective Clear Aperture (in) N/A
Objective Clear Aperture (mm) 50.00 mm
Elevation Adjustment Range 120.00 moa
Windage Adjustment Range 50.00 moa
Specification Value
Scope Profile Diagram
A. Length 14.50 in
B. Tube Length 5.10 in
C. Illustration 2.70 in
D. Illustration 2.40 in
E. Eyepiece Length 3.10 in
F. Objective Length 4.40 in
G. Objective Diameter 2.30 in
H. Eyepiece Diameter 1.70 in
K. Tube Diameter 1.38 in
34.00 mm

Mark 4 Tactical Scope Cover - XX-Large

Keep your Leupold® riflescope looking like new. Protect its finish from dirt and damage with a scope cover. Available in many sizes to fit most Leupold scopes, the scope cover is made of water-resistant, nylon-laminated neoprene. Protect your scope in storage or in the field.

Mark 4 ARD Anti-Reflection Device - 50mm

We’ve created these threaded anti-reflective devices in nearly every objective lens size, each featuring scores of tiny, light-transmitting honeycomb baffles that reduce lens glare without obscuring your sight picture.

Alumina Flip-Back Lens Cover - 50mm

Designed for Leupold scopes built after 2003, Alumina® Flip-Back™ lens covers feature powerful neodymium magnets to hold them securely closed and the triple O-ring seals provide maximum protection from the elements. Constructed out of durable 6061-T6 aircraft grade aluminum, they are precisely machined to allow for quick and easy operation, and a low-profile position, when open, make these Flip-Back lens covers stand above the rest. The round objective and ocular models can be rotated so they can open in any direction. Scopes built prior to 2003 can be threaded to accept Alumina accessories at a 50% discount, with proof of purchase, through the Leupold Custom Shop by calling 800-538-7653.

Alumina 4in—50mm Lens Shade

Protect the riflescope objective lens from rain and sunglare. The 2.5 and 4 inch, 50mm Lens Shades can be threaded together to create custom lengths. 4 inch model vailable in Gloss, Matte and Silver finishes. 2.5 inch model available in Matte only. Fits all Leupold riflscopes with 50mm objectives manufactured after 2004.

Alumina 2.5in—50mm Lens Shade

Protect the riflescope objective lens from rain and sunglare. The 2.5 and 4 inch, 50mm Lens Shades can be threaded together to create custom lengths. 4 inch model available in Gloss, Matte and Silver finishes. 2.5 inch model available in matte only. Fits all Leupold riflscopes with 50mm objectives manufactured after 2004.

International Traffic in Arms Regulations

See the ITAR Compliance
View All Tactical Scopes

Mark 4 ER/T Riflescopes

Max
Magnification
Objective
Size
BDC
Dial
Available
BDC
Reticle
Available
Illuminated
Reticle
Available
Starting
Price
14.60x 50.00mm Yes No No $1,999.99
14.60x 50.00mm Yes No No $2,079.99
14.60x 50.00mm Yes No No $1,999.99
20.00x 50.00mm Yes No No $3,119.99
20.00x 50.00mm Yes No No $2,209.99
20.00x 50.00mm Yes No No $2,124.99
20.00x 50.00mm Yes No No $2,209.99
25.00x 50.00mm Yes No No $2,469.99
25.10x 50.00mm Yes No No $2,469.99