The Trijicon 1-6x24 VCOG (Variable Combat Optical Gunsight) is a rugged variable powered riflescope that accommodates close quarter battle (CQB) and long distance marksmanship. It features superior glass quality and light gathering capabilities with zero distortion. The bullet drop compensating and ranging reticles allow for the shooter to quickly and accurately estimate range and apply the correct hold. The first focal plane reticle allows the subtensions and drops to remain true at any magnification. With a forged 7075-T6 aircraft-aluminum-alloy housing, the VCOG is an exceptionally durable and nearly indestructible sighting system. Robust enough for any application. It utilizes a single AA battery, commonly found across the globe and offers 6 adjustable brightness settings for the LED reticle. When powered by a lithium AA battery (like the one provided), it boasts a considerable battery life of 700 hours at setting 4 (constant on). An integrated dial fin allows easy rotation through the magnification range and a constant eye relief means no head or stock position adjustments are needed. Waterproof to 20 meters (66 ft.). For BDC drops, click the reticle and scroll through additional images.The Trijicon 1-6x24 VCOG (Variable Combat Optical Gunsight) is a rugged variable powered riflescope that accommodates close quarter battle (CQB) and long distance marksmanship. It features superior glass quality and light gathering capabilities with zero distortion. The bullet drop compensating and ranging reticles allow for the shooter to quickly and accurately estimate range and apply the correct hold. The first focal plane reticle allows the subtensions and drops to remain true at any magnification. With a forged 7075 T6 aircraft aluminum-alloy housing, the VCOG is an exceptionally durable and nearly indestructible sighting system. Robust enough for any application, the VCOG utilizes a single AA battery, commonly found across the globe and offers 6 adjustable brightness settings for the LED reticle. When powered by a lithium AA battery (like the one provided), it boasts a considerable battery life of 700 hr at setting 4 (constant on). An integrated dial fin allows easy rotation through the magnification range and a constant eye relief means no head or stock position adjustments are needed. Waterproof to 20 m. Features: Superior quality glass - multi-coated lenses provide superior clarity and light-gathering capabilities with zero distortion Rapid target acquisition - first focal plane reticle allows user to rapidly acquire target and apply correct hold throughout magnification range Quick, accurate ranging reticles - 1-6x24 offers BDC or universal MRAD and MOA reticles; 1-8x28 offers universal MRAD and MOA reticles No rings needed - the need for conventional ring mounts is eliminated with the integrated mounting adapter that provides quick and easy mounting to any rail system Quick magnification adjustments - integrated dial fin allows easy rotation through magnification settings Virtually indestructible - tested to MIL-STD-810G, a series of tests approved by the US department of defense to simulate conditions in the field Bright, crisp illumination - brilliantly illuminated reticle is powered by a single AA battery Easy-to-set adjusters - allows user to easily adjust windage and elevation Adjustable brightness settings - multiple brightness settings with an "off" between each setting - 1-6x24 models feature 6 brightness settings LED illumination source 66 feet submersion depth 700 hr continuous use at brightness setting 4 of 6 battery life