Designed with enhanced ergonomics to provide lethal functionality. UV Slider establishes a new benchmark for sliding sights with innovations such as DualDial , TripleMark , and QuickBreak ensuring unparalleled precision. With these innovations, UV Slider allows you to stay focused in the moment to make chaos stand still. What's in the Box UV Slider Rack & Rail assembly (Your choice of mounting style) UV3XL SE (3-pin only) 140yd sight tapes Compact travel case White Viz Ring "No-Light" Cap Pre-installed batteries Spare Hardware Instruction Manual Features DualDial TripleMark QuickBreak UV3XL SE Twin Sight Tapes Anti-Backlash Pre-aligned 2nd axis with micro-adjust 1st & 3rd *PLEASE NOTE* Slider mounts are NOT interchangeable due to the orientation of the slider model. Once assembly begins, mount options CANNOT BE CHANGED. Requesting to change the slider orientation upon order arrival will require a waitlist exchange, which will place you into a later batch.