Trijicon 100155 ACOG 3.5x35mm Illuminated Green Horseshoe .308 Riflescope - Black Hardcoat Anodized

The Trijicon ACOG (Advanced Combat Optical Gunsight) model 100155 is a battle-proven, fixed-power combat optic designed for fast, instinctive target acquisition in any lighting condition. This 3.5x35 configuration is calibrated specifically for the .308 Winchester / 7.62x51mm NATO cartridge, with bullet-drop compensation holds effective out to roughly 1,200 meters on flattop rifles.

The optic carries Trijicon's dual-illumination system, pairing advanced fiber optics for daylight with self-luminous tritium for nighttime and low-light use, so the reticle is always visible without batteries. The reticle is an illuminated Green Horseshoe 308 Ballistic pattern that frames the target while providing rapid holdover references for known distances.

Optically, the scope features a 35mm objective, multi-coated lenses, and a generous 2.39" eye relief. It delivers a 28.90 ft field of view at 100 yds for excellent situational awareness and target tracking at close and intermediate range. Windage and elevation are tuned via a precise 3-click-per-inch @ 100 yds adjustment.

Built around a rugged Black Hardcoat Anodized housing, the ACOG is fogproof, shockproof, and waterproof to 100 meters, with the housing dry-nitrogen filled to eliminate internal fogging. It is shock-resistant and has been proven to withstand recoil from 22 LR up to .50 BMG, easily passing U.S. military drop tests.

Measuring 8" long and weighing just 14 oz, the scope ships ready to mount with the included TA51 thumbscrew flattop adapter, making installation on a Mil-Std 1913 Picatinny rail straightforward. It is the same combat-trusted platform carried by U.S. and allied forces.