Trijicon ACOG 4x 32mm Rifle Scope - Illuminated Red Horseshoe w / Red Dot 6.8 SPC - The ACOG is an internally-adjustable, compact telescopic sight with a tritium illuminated reticle pattern for use in low light or at night. It combines traditional, precise distance marksmanship with close-in aiming speed. This model's design if for use with the M16 family, every feature of its mechanical and optical design was chosen for a single purpose: to provide increased hit potential in all lighting conditions. Features an Illuminated Red Horseshoe w / Red Dot 6.8 SPC reticle.