The thunder ranch 1-6x24 was developed in conjunction with the infamous clint smith.His input and data are what birthed the thr bullet drop compensator reticle found in this optic.The daylight bright green illumination was a must for clint.His time as a battle-hardened marine along with his time as a law enforcement officer make his input invaluable.Magnification: 1-6xObjective: 24mmField Of View: 18.33 - 111.20 ft @ 100 ydsEye Relief: 3.50"Tube Diameter: 30mmWeight: 22.20 ozReticle: Illuminated Green Thunder RanchParallax Adjustment: 100 ydsProofs: Fog/Shock/WaterproofOptic Coating: Fully Multi-Coated