The Nikko Stirling Targetmaster is a great choice for competitive shooters or precision plinkers. The scope features a 30mm tube for added strength and light transmission. The exposed target turrets provide precise adjustments and are resettable to zero, and the side focus knob allows for quick and easy parallax adjustment. Illumination adjustment is integrated into the side focus parallax knob. Each scope includes a sunshade, flip-open lens covers and is covered by a limited lifetime factory warranty.