The Trijicon AccuPoint 5-20x50 Riflescope allows shooters do extend their range in any light, and was designed primarily for tactical shooters and law enforcement snipers. Using fiber-optics and tritium aiming point illumination. The dual-illumination fiber optic system automatically adjusts aiming-point brightness to existing lighting conditions. Other features of the 5-20x50 riflescope include long-range capabilities due to its light-gathering 50mm objective, adjustable parallax and large, easy-to-use external turret adjustment controls.