The HWS 512 is perfect for anyone who wants fast target acquisition, reliability, durability, and the anyplace availability of AA batteries without the need for night-vision compatibility. The 512 is our most popular HWS in the lineup. Its ideal when you need the best in speed and versatility, without night vision compatibility. Mount 1" Weaver or Mil-Std 1913 rail. Includes quick start guide, batteries and protective case.