Trijicon's ACOG (Advanced Combat Optical Gunsight) is a fixed power, compact riflescope with an illuminated reticle pattern for use in bright to low/no light with legendary durability and reliability. Every feature of its design was chosen for a single purpose, to provide increased hit potential in all lighting conditions. Fewer moving parts than a variable optic equals more durability, and the forged 7075-T6 aircraft-aluminum-alloy housing provides for a nearly indestructible sighting system. Multi-coated lenses provide superior clarity and light-gathering capabilities with zero distortion. The ACOG is dry-nitrogen-filled to eliminate fogging and waterproof to 100 meters. It is shock-resistant, proven to withstand recoil from 22LR up to 50 BMG, and easily passes U.S. military drop test requirements. The 3x30mm model is designed for law enforcement and military applications, where the combination of ample magnification, low light capability and long eye relief make it the ACOG of choice. This ACOG features a dual illuminated red crosshair 300 AAC Blackout 115/220GR ballistic reticle (for subsonic and supersonic rounds) and includes a TA60 flattop mount.The 3x30 ACOG model is designed for law enforcement and military applications - where the combination of ample magnification, low light capability and long eye relief make the TA33 the Trijicon ACOG of choice. This ACOG scope features dual illumination red crosshair 300 AAC blackout ballistic reticle for subsonic and supersonic rounds. Features: Always on, always ready - most ACOG models are battery free, featuring a tritium/fiber optic illuminated reticle that automatically adjusts the brightness based on available light "Both eyes open" design - shooting using the Bindon Aiming Concept (BAC) allows for improved situational awareness Combat proven - no other magnified optic has been used more in combat than the ACOG Take control - several ACOG models are designed with a user adjustable brightness setting powered by a single AA battery, the 3.5x35 LED and 4x32 LED models both offer six adjustable brightness settings Outstanding clarity - the quality of the glass and multi-coated lenses maximize light-gathering capabilities and clear field of view with zero distortion Shock-resistant - proven to withstand recoil from a .22 LR to a .50 BMG and everything in between, easily passes US Military drop test requirements Rugged, reliable housing design - fixed-power design allows for minimal moving parts to create a nearly indestructible sighting system Exact target distances and holds - most ACOG models feature a bullet drop compensating and target-ranging reticle for decisive aiming Waterproof - exceptional waterproof performance that exceeds military standards, dry nitrogen-filled to eliminate fogging Fiber optics and tritium power and illumination source