Leupold Mark 4HD 2.5-10x42mm Riflescope, 30mm Tube, FFP, M5C3, TMR Reticle, Matte Black – 183740

The Leupold Mark 4HD 2.5-10×42 (Leupold part #183740) is a 2.5-10x42mm riflescope with a 30mm main tube and the TMR reticle in the first (front) focal plane. The Mark 4HD is Leupold’s precision and tactical line, built for fast, repeatable dialing with Leupold’s HD optics.

Key Features

• 2.5-10x magnification (4x zoom range) with a 42mm objective
• First focal plane reticle: holds and ranging marks stay accurate at every magnification
• M5C3 elevation turret with a locking dial to prevent accidental adjustments
• Waterproof and fogproof, backed by Leupold’s lifetime guarantee

TMR Reticle

The TMR (Tactical Milling Reticle) builds on the Mil-Dot concept, using hash marks instead of dots for more precise ranging and holds. Marks are spaced 0.5 MIL apart, tightening to 0.2 MIL toward the edges, with aiming points for both wind and elevation. It is not caliber specific. See the reticle diagram in the product photos.

Specifications

FAQ

What size scope rings does this scope need?

It has a 30mm main tube, so you need 30mm rings. A good match is the Leupold BackCountry Cross-Slot 30mm Medium Rings, or browse all scope rings.

What does first focal plane (FFP) mean?

The reticle sits in front of the magnification lenses, so it grows and shrinks as you zoom. That keeps every hash mark’s value the same at any power, which makes holdovers and ranging work at any magnification.

Buy at Black Bayou Armory

Order the Leupold Mark 4HD 2.5-10×42 online for free in-store pickup at Black Bayou Armory in Benton, Louisiana, serving Bossier City, Shreveport and the ArkLaTex. Shop more Leupold optics.