The Trijicon 4x32 ACOG rifle scope is a fixed-power combat optic that has earned its reputation through decades of real-world use by military and law enforcement operators. Built on the proven Advanced Combat Optical Gunsight platform, this 4x32 delivers a rugged, no-compromise sighting system designed around the needs of shooters who demand reliability in high-stress situations. The matte finish and green chevron reticle make target acquisition intuitive, whether you're working at close quarters or stretching shots out to 800 meters with the integrated bullet drop compensator.

What sets the ACOG apart from typical hunting scopes is its hybrid illumination system: fiber optics gather ambient light during the day to automatically brighten the reticle, while self-luminous tritium takes over in low light or total darkness—all without batteries. The fixed-power design means fewer moving parts and superior shock resistance; this scope is built to survive the recoil from anything you thread it onto and passes military drop-test standards. At 1.5 inches of eye relief and a 7-degree field of view, it's optimized for tactical shooting postures and keeps both eyes in the fight using Trijicon's Bindon Aiming Concept (BAC), which preserves situational awareness even when focused downrange.

The scope arrives with a complete mounting package: thumbscrew flattop adapter (TA51), flip caps, anti-reflection killFlash device, cleaning pen, and adjuster cap lanyard. Windage and elevation adjusters are external and tool-free. The nitrogen-filled, forged aluminum housing resists fogging and performs in temperature extremes, and the multi-coated optics deliver the optical clarity expected from Trijicon's glass. If you run an AR platform or other flattop receiver and need an optic proven in combat, the 4x32 ACOG is a legitimate choice.

Key Features

• Fiber optic and tritium illumination—no batteries required for nighttime operation
• Green chevron reticle with 800-meter bullet drop compensator for precise aiming at distance
• Fixed 4x magnification with minimal moving parts for maximum durability
• Both-eyes-open design via Bindon Aiming Concept for situational awareness
• 1.5-inch eye relief and 7-degree field of view optimized for tactical carbine use
• Waterproof, nitrogen-filled housing rated beyond military standards
• Shock-resistant construction proven to .50 BMG recoil levels
• Tool-free windage and elevation adjustments
• Includes TA51 thumbscrew mount, killFlash device, flip caps, and lanyard

Specifications

Magnification	4x
Objective Lens	32mm
Reticle Pattern	Green chevron
Illumination	Fiber optics & tritium (battery-free)
Eye Relief	1.5 inches (38.1mm)
Exit Pupil	0.32 inches (8.13mm)
Field of View	7°; 36.8 ft @ 100 yards
Caliber Focus	.223 Remington (M4 platform, 14.5" barrel)
Bullet Drop Compensator	Yes, to 800 meters
Mount	TA51 thumbscrew flattop adapter (included)
Housing	Forged aluminum, matte black finish
Weight	16.2 oz (459g)
Waterproof	Yes, exceeds military standards; nitrogen-filled

Frequently Asked Questions

Will this ACOG fit my AR-15 with a flattop receiver?

Yes. The 4x32 ACOG comes with the TA51 thumbscrew flattop adapter, which mounts to standard Picatinny rails on AR-15 or M4 receivers. No gunsmithing required.

Do I need batteries to use the reticle illumination?

No. The reticle is illuminated by fiber optics during daylight (which automatically adjust brightness to ambient light) and by self-luminous tritium in darkness—entirely battery-free. This optic is ready to go whenever you are.

What's included in the box?

The ACOG arrives with the TA51 thumbscrew mount, killFlash anti-reflection device, objective and eyepiece flip caps, lens cleaning pen (TA56), adjuster cap lanyard, and documentation.

Is this scope waterproof?

Yes. The nitrogen-filled, forged aluminum housing is tested and rated to exceed military waterproof standards and is designed to perform in extreme temperature swings without fogging.