Trijicon ACOG Purchase Includes
ACOG Scope
TA51 Flattop Mounting Bracket
Pelican Water Proof / Crush Proof Hard Case
ScopeCoat Protective Lens Cover
Trijicon Lens Pen Cleaning Tool
Trijicon ACOG TA31F DescriptionThe Trijicon ACOG TF31F is equipped with a Dual Illumination Red Chevron Reticle…fiber optics provides daylight illumination and tritium illuminates the reticle at night. No Batteries are used for its illumination system! The unit is also equipped with the Trijicon TA51 Flattop Mount so attachment is quick and easy. When used with the .223 cal. - (NATO 5.53) this scope is designed to be zeroed in dead-on using the tip at 100 meters and provides additional ballistic aiming points for dead-on accuracy out to 800 meters. Additionally, the reticles unique design allows for easy range estimation for human silhouette targets. Designed to utilize the revolutionary BAC “Bindon Aiming Concept” where both eyes are kept open for easy target acquisition and aiming lethality.
Understanding the Bindon Aiming Concept
The Bindon Aiming Concept “BAC” is a unique and highly effective aiming principle brought forth by the inventor of the Advanced Combat Optical Gunsight “ACOG”, Mr. Glyn A. J. Bindon. The ACOG combines traditional long-stand-off marksmanship capability with the ultimate in close-quarters transitional aiming. This is accomplished by allowing two-eye-open aiming in a magnifying optical system by taking advantage of a glowing reticle. This bright aiming reticle, which is illuminated by a fiber optic system, is a significant improvement over red dot reticles or other collimator sights, and enhances the speed and accuracy at which the eye can track and aim the reticle.
The BAC discovery was made after a long search for a way to combine the speed of the Armson O.E.G and similar red dot collimator sights with the precise accuracy of the telescopic rifle scope. Some of you may use two-eye aiming with telescopic sights that use ordinary crosshairs for a reticle pattern. This can be done, but it is much more difficult and requires greater effort, concentration, and training. The BAC principle is automatic…it happens instinctively. The bright reticle functions in the daytime while maintaining a high contrast to low light conditions.
The ACOG provides an aiming reticle that is in focus with the target. This is a major advantage in combat. It takes tremendous amounts of concentration, training, and skill to shift focus back and forth from a threat to properly operate iron sights in combat. The ACOG allows the shooter to focus on the target and impose the aiming reticle on the selected point of impact. This is much faster and more accurate in combat shooting situations. Because the eye and the brain don’t have to keep switching focus a proper sight picture is possible in 1/24th of a second. This “flash” sight picture is all that is required to hit the target.
In order to take advantage of the BAC feature you must keep both eyes open at all times. You raise the weapon and begin to move into alignment with the target and the reticle begins to appear in the target area while it's in motion. As soon as you get close to the target your brain will suddenly switch to the magnified view allowing you to make your final aiming adjustments. It takes less time to learn the BAC than it did for you to read this paragraph.
Why it works...it's all about how your brain chooses images: When the weapon is being moved the image through the telescope blurs much more quickly than the view form the other unmagnified eye, so the brain chooses the non-blurry view automatically. As soon as you are close to the proper aim on the target, you slow down the weapon movement, the blur ceases, and your brain instantly selects the greater detail of the magnified view.
Understanding the ACOG Illumination System
The aiming point is always illuminated. It glows at night from tritium, and during the day from the fiber optic light gathering system. Because the fiber optic system is always adjusting the brightness of the image you're presented with the level of illumination that's ideally suited for the surrounding environmental light conditions. This delivers optimal contrast and resolution regardless of the shooting situation.