The RXS-100 is the new market leader in price and performance. Class leading value starts with multi-platform versatility with its DeltaPoint Pro mounting pattern, daylight bright 4 MOA dot with 8 settings, side battery door, up to 5000 hours of battery life, and an included Weaver-style low-rise mount. The RXS-100 has all the must have features and performance you need, at a price that can't be beat. Top that with Bushnell's Lifetime Ironclad Warranty, and you're ready to hit the range or field. Get yours today. EFFICIENT CLEAR 4 MOA DOT WITH 8 BRIGHTNESS SETTINGS Point source LED creates a clean beam that produces a strong dot without wasting energy. LONG LASTING BATTERY LIFE With 5,000 hours on the mid setting (Setting 5) you won't need to change the battery any time soon. The side loading battery is easy to replace without removing the sight from the firearm, allowing you to retain your zero. MOUNTS ON PISTOLS, AR'S AND SHOTGUNS Works across all common red dot mounts with DeltaPoint Pro footprint and included Weaver-style low-rise mount. DURABLE ALUMINUM CONSTRUCTION Rugged, aircraft grade, extruded aluminum housing ensures the glass and electronic internals are protected against firearm recoil (including pistol) and rough field use. CONVENIENT LAYOUT AND DESIGN Detented Windage/Elevation adjustment with 1 MOA per click. Top loading battery (CR2032) for easy replacement. Easy access push button design for brightness setting adjustment.