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The following spec is for a standard model of Leupold Mark 4 16x40 LR/T M1 Riflescope 45580. Please note that if you select one of the custom rifle scope options, the standard specs for the riflescope might change according to your selection.

Leupold Mark 4 16x40mm LR/T M1 Scope - Leupold' s goal of a scope that would be ideally suited to the special needs of the military and high intensity law enforcement organizations was achieved in the creation of the Mark 4 series. The Mark 4 10x40mm LR/T M1 is not only astoundingly durable, it is optically outstanding as well. The M1's oversized adjustment knobs give the user audible and tactile confirmation of each 1/4-MOA click.

Specifications for Leupold Mark 4 16x40 mm LR/T M1 Scope:

Actual Magnification:  15.6
Reticle:  Duplex
Length (in):  12.90
Eyepiece Length (in):  2.70
Objective Length (in):  4.34
Objective Diameter (in):  1.96
Eyepiece Diameter (in):  1.68
Tube Diameter:  30mm
Weight:  22.5 oz. / 638 grams
Eye Relief (in):  4.0
Eye Relief (mm):  101
Obj. Lens Diameter:  1.6in / 40mm
Max. Adjustment @ 100 yds (in):  140(e) 45(w)
Max. Adjustment @ 100 m (cm):  389(e) 125(w)
FOV @ 100 yds (ft):  6.8
FOV @ 100 m (m):  2.3

Features of Leupold Mark 4 16x40 mm LR/T M1 Scope:

  • Side focus parallax adjustment dial
  • Multicoat 4® lens coating
  • 30mm maintube
  • 1/4 MOA click, M1-style, windage and elevation dials
  • Leupold Full Lifetime Guarantee

Package Contents:

  • Leupold Mark 4 16x40 mm LR/T M1 Scope

Leupold Custom Shop Riflescopes

Leupold Rifle scopes can now be customized to your exact specifications though OpticsPlanet's Leupold Custom Shop Program! Not only we can offer you the best prices on brand new Leupold Riflescope, but can have them personalized for you exactly to your specifications - we can even have your name engraved on them. All of the upgrade work done at the Leupold facilities by the experts from Leupold Custom Shop right before we ship the riflescope to you!. is an Authorized US Leupold Online Dealer offers quick turn around of your order, you are covered with our Best Deal Guarantee, Ground shipping is free of charge within lower 48 US States (yes, we also cover Leupold Custom Shop's $15 S&H Fee for you!  Please take a look at our extensive list of the individualization options, select one or more custom features and order your personalized Leupold Riflescope though our unique online custom riflescope order system!

Our Leupold Custom Shop Program offers unique opportunities for individuality.  It's hard to imagine a better hunting gift that will last a lifetime than a one-of-a-kind top-of-the-line riflescope with extremely functional features specifically designed for your shooting style.   In addition to custom reticles and adjustment dial changes, Leupold Custom Shop offers through custom laser engraving, 24K gold plating, custom anodized scope finishes, eyepiece and objective threading and much more.  After all or any of these customizations, your Leupold riflescope maintains its Leupold Lifetime Warranty and stays totally waterproof and fogproof, and they stay optically and functionally perfect.

Custom Leupold Riflescope Laser Engraving

Leupold Laser engraving on turretIf you want a Leupold rifle scope that is truly unlike any other, consider Leupold's personalized laser engraving.

"Custom Built For" Rifle Scope Name Engraving Option
It is a very unique gift idea, and this personalized option let's everyone know who this riflescope was custom-built for, with engraving on the turret or even on the objective bell.  Need the best gift for your father, add his name on his new riflescope.  Need a unique business gift idea, add your company name or a short slogan to your Leopold riflescope order.

Initials on Adjustment Cover of your Leupold riflescope

Want an inexpensive custom option? Add a three letter monogram to the adjustment covers, for a classic touch.

Wildlife Image on Bell (Right or Left sides)

Another option that we offer is a laser engraving of your riflescope with the profile of one of the world's most magnificent game animals, including: elk, whitetail buck, mule deer, or big horn sheep.  Black matte and gloss riflescopes feature laser engraving backfilled with white. All silver scopes will be backfilled with black. The result is a crisp looking engraving that stands out and lasts as long as your Leupold rifle scope.

Leupold Elk laser engravingLeupold Whitetail buck laser engravingLeupold Mule deer laser engravingLeupold Big horn sheep laser engraving
ElkWhitetail BuckMule Deer Big Horn Sheep

Each profile has been custom designed for Leupold, making your riflescope a true work of art. The laser engraving is performed at Leupold's Beaverton, Oregon manufacturing facility.

24K Gold Plating

24K gold plating example

Optics Planet Customers ordering Leupold VX-III, FX-III, LPS, VX-L riflescopes can now add a great customization: 24k gold plating of the ring and medallion.

The brilliant 24 k gold will set your scope apart, even among other Leupold scopes. Leopold's 24 karat gold plating is a much brighter, sharper, richer finish, and it's just as durable and long-lasting as your Leupold riflescope. Gold plating the wide Golden Ring and medallion will add immense value, while enhancing the good looks and classic lines of your premium Leupold rifle scope.

Totally Custom Anodized Finishes for Leupold Rifle scopes (please allow 8 to 12 weeks)

For nearly 60 years, Leupold has used a hard anodized finish on Leupold rifle scopes, because it's the toughest finish it could apply. Now, through the Leupold Custom Shop, OpticsPlanet can offer several new, exciting solid colors, fades, or even a unique "splatter" to any color offered. Anodized Custom ColorsYou can get an amazing looking one-of-a-kind riflescope with Leupold's custom anodizing processing.  It is not a cheap riflescope customization option, but truly custom color selection does create a unique scope like no other!  

Some of the options that you might find in a printed Leupold Custom Shop Catalog or shown here are not available at this time. At the moment, our Leupold Custom Shop only offers one solid color option or a fade from black color in front to your choice of color at the ocular - you can get a solid color, or matte black faded to a matte custom color, or gloss black faded to a gloss custom .  Leupold Custom Shop offers the following options: Forest Green, OD Green, Smoke Gray, Gun Metal Gray, Cobalt Blue, Competition Red.  You can also select Black or Silver anodizing if the Leupold riflescope that you selected to customize is not available in that color.  (please note that shown color swatches are representational only and are not exact - we are working with Leupold to get better pictures for this option)

In our Leupold Custom Shop you can choose one color, you can have your riflescope matte or gloss, with fade or a tie die! The price arithmetic is not simple, so here is an example on how a custom finish price is calculated. 

  • Custom AnodizedBase price for ONE solid matte color $150.00
  • Add gloss finish $100.00
  • Add splatter $35.00 then add a fade for $35.00
  • Add tie die $35.00

To add a fade from black to red in gloss with green and red splatter would be $150.00 + $100.00 + $35.00 + $35.00 + $35.00 = $355

If select a custom anodized finish, please allow 8 to 12 weeks for the scope to be completed, while all other custom options are normally completed in four to six weeks!

Leupold Custom Ballistically Matched Reticles

Custom ballistically matched reticles Leupold Custom Shop has put 50 plus years of scopesmithing experience to work, building a personalized, digitally mastered reticle from our custom reticle library, for the
long distance shooter. Using state-of-the-art manufacturing technology the riflescope and reticle are perfectly tuned to your rifle's ballistic performance. The result is a custom, long distance shooting rifle scope system with astonishing accuracy. You simply enter in the form the ballistic coefficient and velocity, or alternately, the specific factory load you are using, and the Custom Shop will do the rest (make sure you get the numbers right - there are no returns on custom scopes!.

The Leupold Custom Shop uses an ultra-modern electroform metal deposition process that incorporates micron precision to create your reticle. This new, custom reticle offered though OpticsPlanet features ballistic compensation, with a 200 yard zero, and dots marking the holdover points for 300, 400 and 500 yards. We've also included reticle features for range estimating.

Leupold Rifle Scope Reticle Change

You have selected your Leupold riflescope from OpticsPlanet, but you want a Mil Dot or interested in another of Leupold's reticles? We can help! The Leupold Custom Shop can install nearly any of the non-illuminated reticle styles pictured in our catalog in any of our non-illuminated scopes. Choose from four sizes of Duplex, two Leupold Dots, a variety of Target Dots, or even the Leupold Mil Dot reticle to mention just a few. In most cases, illuminated reticles can only be installed in illuminated reticle scopes.

Leupold riflescope reticles Leupold riflescope reticles

Custom Bullet Drop Compensation Dials

You know your rifle, riflescope, load, and ballistics like nobody else. Now you can have custom Custom BDC dialsBullet Drop Compensation (BDC) dials for your Leupold riflescope. If you would like this option, please fill out our ballistics worksheet above with your ballistics data, and Leupold will create a precision laser-engraved dial that will allow you to adjust for bullet impact at extremely long range.

Leupold's positive click adjustment dials are made of aircraft-grade aluminum with the appropriate ranges clearly and accurately laser engraved on the dial. You determine range to the target, then adjust to the corresponding mark on the elevation dial to achieve startling long range precision. If you are a serious long distance shooter, this upgrade is a simple, yet extremely valuable modification to your scope that will prove its worth immediately in the field.  Long range shots become more precise and more ethical, greatly improving shooting with practice..

Target-Style Adjustment Dial Changes

Custom Target-style adjustment knobs is one of the examples examples of the adjustment dial options for your Leupold scope. Leupold Custom Shop can install the dials of your choice in almost any leupold riflescope(the LPS models being the only exception). We can even change the dials of the Leupold VX-III Long Range M3 to those of the Leopold VX-III Long Range M1. You can have the elevation dial alone changed, or change both. The combinations are many, and the choice is all yours. If you are an expert target shooter, adjustment dial option is a great upgrade to you Leopold riflescope.
Adjustment Dial Changes Adjustment Dial Changes Adjustment Dial Changes

The Custom Shop and the Leupold Full Lifetime Guarantee

For years, Leopold has proudly offered the best consumer protection in the industry - the Leupold Full Lifetime Guarantee. All Leupold Custom Shop customizations purchased through are covered by the Leupold Full Lifetime Guarantee.

OpticsPlanet stands behind all of the products we sell and guarantees the Authenticity of the Leopold riflescopes and all custom work is done through Leupold Custom Shop!  We at Optics Planet guarantee the best price from an Authorized US Leupold dealer - all riflescopes are brand new from the factory with full Leupold life time warranty.

Important Notes:

  1. Please note that all orders for Leupold Custom shop must be placed online. Please make sure to select correct options and check the spelling for your engravings.  There are absolutely NO returns accepted on any of our Leupold Custom Riflescope orders!  All Custom Rifle scope orders are prepaid, and we will charge your card for the full amount at the moment we send the order to Leupold Custom Shop to get the customization done.  You must agree to our policy at the time of ordering.
  2. The custom work is done on brand new Leopold riflescopes at the factory.  At this time we are unable to accept orders on any riflescopes that have been purchased through any other means but OpticsPlanet online store.
  3. Custom modifications can be ordered only at the time of purchase - we are unable to accept any changes once the order is placed.
  4. The order is normally done within 4 to 6 weeks (allow 8 to 12 weeks if you choose an anodized coating).  Please allow anywhere from a few additional days to a week for shipping the custom scope to your doorstep (UPS Ground within lower 48 States is free of charge and there are no additional processing fees!).
  5. We are an Authorized US Leupold Dealer and guarantee the best price and full Leupold Lifetime warranty on all Leupold rifle scopes.
  6. We do NOT export on any of our riflescopes outside of the United States, and that includes custom Leupold Riflescopes offered here

Feel free to contact us with any questions!

Leupold Mark 4 16x40 LR/T M1 Duplex Reticle Riflescope 45580 Customized by Leupold Custom Shop

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