The Scope That Changed Everything. There's a reason the Trijicon ACOG® (Advanced Combat Optical Gunsight) is the official medium-distance engagement optic of the Marine Corps and U.S. Special Operations Forces.
Green Horseshoe/Dot Reticle, Thumbscrew Mount and ARD, Tritium / Fiber Optics Illuminated.
And there’s a reason why more than one million ACOGs have been produced. Every feature of its innovative design was chosen for a single purpose: to provide increased hit potential in all lighting conditions. This is possible through a brilliantly illuminated reticle pattern, a compact design, and legendary durability that continues to lead the industry.
In 1991, the Trijicon ACOG® was chosen by the U.S Navy SEALs for testing, then operations. In 1995, German GSG9 SWAT chose the 3.5x35 model for their 550 rifles. Ever since, the ACOG® 3.5x35 riflescope has remained a favorite among competitive shooters, law enforcement and freedom-loving civilians everywhere.
The TA11MGO-M249 3.5x35 ACOG is a Machine Gun Optic (MGO) designed specifically for the M249 weapon system. The MGO provides the shooter enhanced target identification and increased hit probability out to 1000 meters utilizing the Bullet Drop Compensator. With threaded bosses on the eyepiece housing, the TA11MGO-M249 allows the end user to incorporate the Trijicon RMR™ sight for close combat situations or any other target designators. The TA11MGO-M249 incorporates dual-illumination technology using a combination of fiber optics and self-luminous tritium. This allows the aiming point to be illuminated without the use of batteries. The tritium illuminates the aiming point in total darkness, and the fiber-optic self-adjusts reticle brightness during daylight according to ambient light conditions. This allows the operator to keep both eyes open while engaging targets and maintaining maximum situational awareness.
Always On, Always Ready
Most ACOG® models are battery free, featuring a tritium/fiber optic illuminated reticle that automatically adjusts the brightness based on available light.
Several ACOG models are designed with a user adjustable brightness setting powered by a single AA battery. The 3.5x35 LED and 4x32 LED models both offer six adjustable brightness settings.
Rugged, Reliable Housing Design
Fixed-power design allows for minimal moving parts to create a nearly indestructible sighting system.
"Both Eyes Open" Design
“Both eyes open” shooting using The Bindon Aiming Concept (BAC) allows for improved situational awareness.
The quality of the glass and multi-coated lenses maximize light-gathering capabilities and clear field of view with zero distortion.
Exact Target Distances & Hold
Most ACOG models feature a bullet drop compensating and target-ranging reticle for decisive aiming.
No other magnified optic has been used more in combat than the ACOG.
Proven to withstand recoil from a .22LR to a .50BMG and everything in between. Easily passes U.S. Military drop test requirements.
Exceptional waterproof performance that exceeds military standards. Dry nitrogen-filled to eliminate fogging. This optic is tested to withstand and perform in extreme cold and heat with dry-nitrogen filled housing that mitigates fogging.
Length x Width x Height
8.7 in x 2.1 in x 2.9 in
(220.98mm x 53.34mm x 73.66mm)
14 oz. (396.89g)
Day Reticle Color
Night Reticle Color
Bullet Drop Compensating (BDC)
Bindon Aiming Concept (BAC)
Fibre Optics & Tritium
Fibre Optics & Tritium
.1 Miles per click @100 yards
2.39 in. (60.71mm)
0.39 in. (9.91mm)
Field of View (degrees)
Field of View (feet)
28.9 ft. @ 100 yds. (9.63m @ 100m)
Flattop Thumbscrew Mount (TA51)
- Thumbscrew Flattop Adapter (TA51)
- Brown Soft Case Pouch
- Eyepiece Flip Cap
- Objective Flip Cap with killFlash Anti-Reflection Device
- LENSPEN (TA56)
- Lanyard Assembly for Adjuster Caps (TA71E)
- ACOG Manual
- Warranty Card