There's a reason the Trijicon ACOGA(R) (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. ACOG 4x32 Scope with Red Horseshoe BAC Reticle- includes Flattop Adapter. Features dual illumination (Fiber optics provides daylight illumina Mfg: Trijicon