• BATTERY-FREE ILLUMINATION: Features a tritium/fiber optic illuminated reticle that automatically adjusts the brightness based on available light.
• RUGGED ALUMINUM-ALLOY HOUSING: Forged 7075-T6 aircraft-aluminum-alloy housing provides for a nearly indestructible ing system.
• “BOTH EYES OPEN” DESIGN: The ACOG can be used as a CQB when shooting “both eyes open,” utilizing the Bindon ing Concept.
• COMBAT PROVEN: No other magnifed optic has been used more in combat than the ACOG.
• BULLET DROP COMPENSATING & RANGING RETICLES: The USMC red Chevron ranging reticle allows for bullet drop compensation out to 800 meters designed for the USMC's M16A4 weapon system (20” barrel).

Product description ------------------- TA31RCO-A4CP Features: -. -Housing material: Forged aluminum. -Magnification: 4. -Objective Size: 32. Laser : -Yes. Magnification: -High (approx. 6X - 30X)/Medium (approx. 3X - 16X). Objective Lens Diameter: -31-40Mm. Finish: -Black. .com ---- Designed to the exact specifications of the United States Marine Corps, the TA31RCO-A4CP features a red dual illuminated reticle and a unique Combat Optic reticle pattern that provides quick target acquisition at close combat ranges while providing enhanced target identification and hit probability out to 800 meters. Long-range s are delivered with greater accuracy thanks to the Bullet Drop Compensator. Coming complete with an ACOG TA51 flattop, Picatinny rail adapter with colt style thumbscrews, the is designed for use with M16A4 Weapon system (20-inch barrel). The TA31RCO-A4CP incorporates dual illumination technology using a combination of fiber optics and self-luminous tritium with the revolutionary, both-eyes-open Bindon ing Concept (BAC),for 'instinctive' target acquisition and increased hit potential. Dual illumination allows the ing point to always be illuminated without the use of batteries. The Tritium illuminates the ing point in total darkness, and the fiber optic self-adjusts reticle brightness during daylight according to ambient light conditions. This allows the operator to keep both eyes open while engaging targets and maintaining maximum situational awareness. The TA31RCO-A4CP is further distinguished by its crystal-clear and distortion-free Broad Band Anti-Reflective Coated Lens, Trijicon fiber optics and self-illuminated tritium phospor lamp for totally battery free operation, and maximum eye- and large exit pupil for ease of use. Constructed of -grade aluminum alloy, the is dry nitrogen filled, and waterproof to 100 feet/30 meters. The 's metal structure and optical system are backed by a lifetime warranty and the tritium lamp is guaranteed to glow for 15 years. The TA31RCO-A4CP comes complete with a coat to safeguard the from dings and scratches, dust, dirt, and moisture in the field and a Lenspen that makes it safe and easy to clean the 's lens in the field. Features: * Trijicon Fiber Optics: Automatically adjusts the brightness level and contrast of the reticle to available light conditions. * Bindon ing Concept (BAC): Trijicon ACOG models equipped with BAC allow use of the both-eyes-open ing method along with magnification ing for rapid target acquisition--in any light. * Broad Band Anti-Reflective Coated Lenses: Multi-coated lenses provide superior clarity and light gathering capabilities with zero distortion. * Trijicon Tritium Phospor Lamp: ing reticle glows in low-light conditions for quick target acquisition--with no batteries to fail. Lamp is guaranteed to illuminate for up to 15 years. * Internally Adjustable: Since only the prism housing moves, the ACOG is much more rugged than conventional designs. * Longer Eye-: Maximum eye- for larger caliber s and large exit pupil for faster target acquisition. * -Grade Aluminum Alloy Housing: Forged 7075-T6 aircraft aluminum alloy housing provides for a nearly indestructible ing system. * Waterproof to 100 Feet/30 Meters: Dry nitrogen filled to eliminate fogging. * Totally Battery Free: Trijicon ACOG delivers increased hit potential in all lighting conditions--without the use of failure-prone batteries. Specifications: * Magnification: 4X * Objective Size: 32 millimeters * Bullet Drop Compensator: Yes * Length: 5.8 inches * Weight: 9.9 ounces * Illumination source: Fiber Optics and Tritium * Reticle Pattern: Chevron with Target Reference System * Day/Night Reticle Color: Red * Calibration: 0.223 * Bindon ing Concept: Yes * Eye : 1.5 inches * Exit Pupil: 8 millimeters * Field of View: 7 degrees * Field of View @ 100 yards: 36.8 feet * Adjustment @ 100 yards: 3 clicks per inch * : TA51 (included) * on: Flattop * Housing Material: forged aluminum * Water-resistant to 100 feet What's in the Box? TA31RCO-A4CP Combat Optic (RCO), TA51 , ACOG Thumb Screw (RCO) (TA53A), RCO 4x32 ACOG Pouch (TA86), 4x32 RCO killFLASH, Adjuster Cap Lanyards, 4x32 coat, Lenspen, Trijicon Logo Sticker, RCO Manual, warranty card Manufacturer Warranty Limited Lifetime: optical systems and metal structure; 15-years: Tritium lamp About ACOG (Advanced Combat Optical ) s: Trijicon ACOG s are internally adjustable, compact telescopic s with tritium illuminated reticle patterns for use in low light or at night. The ACOG's combine traditional, precise distance marksmanship with close-in ing speed. Designed for use with the M16 family, every feature of the ACOG's mechanical and optical design was chosen for a single purpose: to provide increased hit potential in all lighting conditions--without failure-prone batteries. With a dual-illuminated reticle, the Trijicon ACOG provides shooters with a distinct ing point in all light conditions--without batteries. Powered by a tritium-phosphor lamp, the 's reticle glows in low-light conditions, while advanced fiber optics automatically adjust the brightness level and contrast of the reticle in brighter light conditions. Broadband, anti-reflective coated lenses provide superior clarity and light gathering capabilities with zero distortion. The ACOG also offers large eye volume, giving you greater leeway--fore and aft, and from side to side--with which to see through the lens. Of course, once the target is acquired, the ACOG is a trusted ally to help you zero in on a perfect . The ACOG is crafted with a tough, -grade, aluminum-alloy housing and is waterproof to depths of 500 feet--making it nearly indestructible. Only the prism housing moves, so it's much more rugged than conventional designs. And the ACOG does not require failure-prone batteries--so you can rely on it to perform in practically every situation. Bindon ing Concept (BAC): Bindon ing Concept (BAC) ACOG s feature bright daytime reticles using fiber optics, which collect ambient light. This revolutionary, both-eyes-open ing method provides you with 'instinctive' target acquisition and increased hit potential. And, the 's ranging is built into many of its reticles, so you only need to set zero once for a multitude of ranging distances. ACOG coat: The coat is constructed of the highest quality neoprene laminated with nylon. Its simple design safeguards the or ing system from dings and scratches, dust, dirt, and moisture. Neoprene has 5 percent greater moisture absorbency, which takes moisture (condensation and sweating) away from the or and helps protect it from rust and corrosion. The nylon laminate shields the against the elements. Simply stretch both ends of the coat over your ACOG for optimum field protection. Lenspen: The Lenspen features a safe and easy to use retractable dust removal brush and a special non-liquid cleaning element, designed to never dry out.