ACOG TA55A designed for the .308 cartridge. As new, no defects, works perfectly. Its less than one year old, was mounted once and then removed. $1100 Comes with all the accessories and paperwork just like new, including the warranty card. Selling because I'll likely be selling the rifle it was on. Trijicon ACOG 5.5x50 with Red Chevron BAC Flattop .308 Reticle TA55 includes Trijicon Flat Top Adapter. The chevron reticle of the Trijicon scope is designed to be zeroed using the tip at 100 meters. The width of the chevron at the base is 5.53 MOA which is 19" at 300 meters. This allows range estimation for silhouette targets. Trijicon TA55 5.5 x 50mm ACOG Advanced Combat Optical sights hit fast in any light. Trijicon ACOG 5.5 x 50 Riflescopes are internally-adjustable, compact telescopic sights with tritium illuminated reticle patterns for use in low light or at night. Bindon Aiming Concept (BAC) models feature bright daytime reticles using fiber optics which collect ambient light. Trijicon 5.5x50 ACOGs combine traditional, precise distance marksmanship with close-in aiming speed. Features: * Military-Grade Aluminum Alloy Housing Forged 7075-T6 aircraft aluminum alloy housing provides for a nearly indestructible sighting system * Binding Aiming Concept (BAC) Trijicon ACOG models equipped with BAC allow use of the both-eyes-open aiming method along with scope magnification sighting for rapid target acquisition - in any light * Longer Eye-Relief Maximum eye-relief for larger calibers and large exit pupil for faster target acquisition * Internally Adjustable Since only the prism housing moves, the ACOG is much more rugged than the conventional designs * Trijicon Fiber Optics Automatically adjusts the brightest level and contrast of the reticle to available light conditions * Trijicon Tritium Phosphor Lamp Aiming reticle glows in low-light conditions for quick target acquisition. Lamp is guaranteed to illuminate up to 15 years. * Totally Battery-Free ACOG delivers increased hit potential in all lighting conditions - without the use of failure-prone batteries * Broad Band Anti-Reflective Coated Lenses Multi-coated lenses provide superior clarity and light gathering capabilities with zero distortion * Proudly made in U.S.A. * Lifetime Warranty Shipping is also available.