Theres a reason the Trijicon ACOG (Advanced Combat Optical Gunsight) is the official medium-distance engagement optic of the U.S. Marine Corps and U.S. Special Operations Forces. And why more than one million have been produced. Each one is specifically engineered to provide increased hit potential in all lighting conditions, while also providing legendary durability and reliability.Features :3X24mm, Green Horseshoe/Dot .223Ruggedized forged housing delivers combat proven durability and reliabilityBindon Aiming Concept (BAC) features both eyes open shooting for improved situational awarenessShock-ResistantRugged Aluminum-Alloy Housing