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Leupold Mark 4HD Rifle Scope 8 32X Magnification 56mm Objective 34mm Main Tube Diameter Illuminated PR3 MIL Reticle Matte Finish Black First Focal Plane 188844 LP188844 UPC 030317059804
Product Description
The Leupold® Mark 4HD 8-32x56mm M5C3 First Focal Plane Illuminated PR3-MIL Rifle Scope (SKU: 188844 / UPC: 030317059804) is engineered for long-range precision rifle competitors, extreme-distance hunters, and tactical marksmen who demand high-magnification target resolution without excessive front-end weight. Combining a massive 56mm objective lens with an expansive 8-32x magnification range and a 34mm main tube, the Mark 4HD delivers razor-sharp edge-to-edge clarity, superior low-light transmission, and uncompromising mechanical tracking when stretching impacts past 1,500 yards.
Machined in Beaverton, Oregon from solid 6061-T6 aircraft-grade aluminum and armored in a matte black hardcoat anodized finish, the 30.0-ounce chassis is purged with Leupold's proprietary argon/krypton gas blend for absolute waterproof and fogproof integrity from -40 degrees Fahrenheit to 160 degrees Fahrenheit. Every Mark 4HD design is validated on Leupold's Punisher recoil simulator, enduring 5,000 consecutive impacts at three times the recoil impulse of a .308 Winchester. Inside, Leupold's Professional-Grade Optical System utilizes DiamondCoat 2 ion-assisted lens coatings and blackened lens edges to eliminate stray light glare and maximize contrast through heavy mirage.
At the heart of SKU 188844 sits the First Focal Plane (FFP) Illuminated PR3-MIL reticle, developed in direct collaboration with top PRS and NRL competitors to provide rapid 0.2 MIL wind and elevation holdovers without obscuring trace or splash. The optic integrates an Electronic Reticle Level that flashes when the rifle is canted more than one degree, alongside Motion Sensor Technology (MST) and 8 push-button illumination settings for dawn-to-dusk engagements. Paired with tactile 0.1 MIL M5C3 ZeroLock elevation and capped windage dials, an integrated removable magnification throw lever, and side-focus parallax adjustment down to 50 yards, the Mark 4HD 8-32x56mm dominates the firing line.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Requires 34mm precision scope rings or a 34mm one-piece cantilever mount (sold separately). CRITICAL MOUNTING & TORQUE WARNING: Because of the 56mm objective bell, flat-top chassis rifles and AR-10 platforms require a minimum optical centerline height of 1.35" to 1.54" (High / Extra-High rings) to clear continuous top rails. NEVER exceed 18 in-lbs of torque on the 34mm ring cap screws, and NEVER apply threadlocker to ring cap fasteners, as wet lubricant alters torque values and can crush internal erector tubes.
- Ensure the host rifle is completely clear, magazine removed, and chamber visually and physically verified empty before securing the rifle in a level armorer vise.
- Mount your 34mm base or lower ring halves onto the receiver Picatinny rail, pushing the cross-bolts firmly forward against the recoil lugs and torquing base fasteners to the mount manufacturer's specification (typically 30 to 65 in-lbs).
- Place the Leupold Mark 4HD 8-32x56mm into the lower 34mm rings, set magnification to 32x, and adjust fore-and-aft position in your natural prone shooting posture until a full, shadow-free 3.9" to 4.2" eye box is achieved.
- Level the PR3-MIL reticle to the receiver rail using mechanical plumb-bob verification or the built-in Electronic Reticle Level, then tighten the 34mm top ring cap screws in an alternating X-pattern to a strict maximum of 15 to 18 in-lbs using a calibrated inch-pound torque wrench.
- Adjust the fast-focus eyepiece diopter against a blank sky until the PR3-MIL etching is crisp, zero the rifle at 100 yards, and reset the M5C3 ZeroLock turret collar to lock your primary zero stop in place.
Key Features
- First Focal Plane Illuminated PR3-MIL Reticle: Precision 0.2 MIL hashmark tree maintains accurate subtensions across all 8-32x magnifications and features 8 push-button brightness settings.
- Electronic Reticle Level & MST™: Built-in cant detection flashes the reticle when tilted past 1 degree, while Motion Sensor Technology automatically deactivates illumination after 5 minutes of inactivity.
- M5C3 ZeroLock® 3-Turn Elevation Dial: Provides 20.0 MIL (70 MOA) of total elevation adjustment in crisp 0.1 MIL clicks with a locking push-button zero stop and visual revolution indicators.
- Professional-Grade Optical System: 56mm objective lens and DiamondCoat 2™ coatings deliver exceptional light transmission, glare reduction, and resolution through heavy downrange mirage.
- Punisher-Tested 34mm Aluminum Chassis: Waterproof, fogproof, and shockproof 6061-T6 main tube backed by Leupold's Full Lifetime Guarantee and proudly designed, machined, and assembled in the USA.
Product Specifications
- Brand: Leupold®
- Model/Series: Mark 4HD 8-32x56mm M5C3 FFP Illuminated
- MPN / SKU: 188844 / LP188844
- UPC: 030317059804
- Magnification Range: 8x – 32x (With Integrated Throw Lever)
- Objective Lens Diameter: 56mm
- Main Tube Diameter: 34mm (6061-T6 Aircraft Aluminum)
- Reticle & Focal Plane: Illuminated PR3-MIL / First Focal Plane (FFP)
- Turret Style & Click Value: M5C3 ZeroLock® Elevation, Capped Windage / 0.1 MIL per Click
- Total Adjustment Range: 20.0 MIL (70 MOA) Elevation / 13.0 MIL (45 MOA) Windage
- Field of View @ 100 Yards: 13.1 ft (8x) – 3.4 ft (32x)
- Eye Relief: 4.2 in (8x) – 3.9 in (32x)
- Parallax Adjustment: Side Focus (50 Yards to Infinity)
- Battery Type: CR2032 (300 to 1,600 Hours Runtime)
- Overall Length: 15.6 in
- Finish / Color: Matte Black Hardcoat Anodized
- Country of Origin: USA (Beaverton, Oregon)
