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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. 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. Designed to the exact specifications of the US Special Operations Command for use by elite US forces, the TA01NSN-308 ACOG's ranging reticle allows for bullet drop compensation of a 308 Win/7.62 Nato projectile out to 800 meters without any manual adjustments. The reticle will appear black during the daytime and will glow amber in the dark, thanks to Trijicon's patented tritium illumination. Includes backup Iron Sights. No batteries needed!