Mark 4 ER/T Riflescopes
Leupold’s® Mark 4® Extended Range/Tactical M1 and M5 Front Focal riflescopes are designed to let you take advantage of the reach and power of today’s long-range rifles. The M5 scopes’ mil based adjustments complement the mil based reticles to make long range shot placement quicker and easier. Like all Leupold Mark 4 Optics, the ER/Ts deliver superior clarity and a generous range of windage and elevation adjustment for the accuracy and precision you demand at extreme distances.
Features
Mark 4 6.5-20x50mm ER/T M5 Locking Adjustment Riflescope
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.
- Includes an auto-locking elevation adjustment for rock-solid reticle adjustment.
- The Xtended Twilight Lens System™ optimizes the transmission of low-light wavelengths, so you see the details of low-light scenes in greater, brighter detail than with any other riflescope available.
- Side focus parallax adjustment for fast, easy parallax focusing from 75 yards to infinity, from any shooting position.
- M5 windage and elevation adjustment dials with audible, tactile 1/10-MIL clicks.
- 120-MOA of elevation adjustment range and 50-MOA of windage adjustment range.
- The reticle is magnified along with the image, so you can estimate range at any magnification setting.
- Available with the Horus® H27, Horus® H58 or Tactical Milling Reticle® (TMR®).
- These reticles provide accuracy of range estimation for hunters and target shooters.
- The 34mm maintube offers incredible strength and allows for the greater range of windage and elevation adjustment.
- Flip-open lens covers are standard issue with the Mark 4® ER/T® riflescope.
- Durable, subdued matte black finish.
- Rugged and absolutely waterproof, the ER/T is built to Leupold Mark 4 standards, and can withstand incredible abuse.
Products containing Horus reticles are produced under license from Horus Vision, LLC and protected by one or more of U.S. Patents 6,681,512, 6,453,595, 6,032,374, and 5,920,995; additional patents pending.
Specifications
Mark 4 6.5-20x50mm ER/T M5 Locking Adjustment
| Length (A) | 14.6 in |
|---|---|
| Tube Length (B) | 7 in |
| (C) | 2.7 in |
| (D) | 2.4 in |
| Eyepiece Length (E) | 3.2 in |
| Objective Length (F) | 4.4 in |
| Objective Diameter (G) | 2.3 in |
| Eyepiece Diameter (H) | 1.7 in |
| Tube Diameter (I) | 34 mm |
| Actual Magnification | 19.5 (6.5) |
| FOV @ 100 yds (ft) | 5.5 (14.3) |
| FOV @ 100 m (m) | 1.8 (4.8) |
| Eye Relief (in) | 3.6 (4.4) |
| Eye Relief (mm) | 93 (111) |
| Obj. Clear Aperture | 2.0 in / 51 mm |
| Weight | 30.9 oz / 876 g |
| Elevation Adj. Range (MOA) | 120 |
| Windage Adj. Range (MOA) | 50 |
All measurements are represented as high (low).

Ordering Information
| Reticle | PART NO. |
|---|---|
| H-27 |
68140 |
| H-58 |
111855 |
| TMR |
67810 |
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