SightMark Core HX 2.0 Laser Sight 3-9x40 DX. This unique laser sight by SightMark has an impressive visibility range up to 20 yards in daylight and 300 yards at night but uses very little power when being used. The quick target acquisition and precision accuracy of this advanced Sightmark laser sight makes it perfect for rapid fire or moving targets and the built-in Weaver mount assures the laser sight unit can fit onto the widest variety of weapons. Make your Mark. Features of SightMark Core HX 2.0 Laser Sight: Advanced accurate tactical laser designator with base x/y adjustment Laser has up to 50yd visibility in daylight and 2640yd visibility at night Quick target acquisition Perfect for rapid fire or moving targets Precision accuracy Built-in Weaver mount Low power usage Lightweight Compact Shockproof Package Contents: SightMark Core HX 2.0 Laser Sight SightMark SM13100DX: Core HX 2.0 Laser Sight 3-9x40 DX