The EOTEch XPS2 is the smallest and lightest holographic weapon sight ever produced by EOTech. Only requiring at most 2 3/4 inches of rail space, the XPS2 leaves plenty of room for other accessories on the rail like rear iron sights or a magnifier. Instead of using a battery cap and large hatch, the XPS has a smaller O-ring and latch to hold one 123 lithium battery in place. Check out the EOTech XPS2-2 with an additional bullet drop reticule for a more versatile aim or the EOTech XPS2-0 with a traditional standard reticule. All XPS2 sights are covered by EOTech's 2 year manufacturing defect warranty, and every sight comes with free ground shipping when you order direct from Webyshops. Receive FREE Ground Shipping on all orders over $39.99.