The Trijicon ACOG 5.5x50 riflescopes are an import part of the world renowned brand’s Advanced Combat Optical Gunsight list of scopes. Available only in caliber-specific versions for .223/5.56 and .308, both the renditions consist of a Picatinny rail adapter along with day/ night illuminated ballistic reticle (with red chevron which is zeroed using the tip at 100 meters). Features take into account a 5.5x magnification range and a 50 mm objective lens diameter . Scopes like the Trijicon ACOG 5.5x50 can be a great option for those who need an instrument that allows range estimation for silhouette targets. The best selling Trijicon ACOG 5.5x50 scopes include Trijicon ACOG 5.5x50 .223 Red Chevron TA55 and Trijicon ACOG 5.5x50 .308 Red Chevron TA55A.Trijicon ACOG Scope Reticles