Military or Government Sales Only! The AN/PVS-14 is the optimum night vision monocular; it was originally designed for the US Military's Special Operations Force. Use it hand held, on a facemask, helmet mounted, or attached to a weapon. The monocular configuration is important to users who want to operate with night vision, while maintaining dark adaptation in the opposite eye. The optional helmet mount is used to attach the AN/PVS-14 directly to the US Military combat helmet. Each Model includes the night vision monocular, Head mount assy, brow pads, sacrificial filter, demist shield, soft carry case, shoulder strap, shipping case, eye cup & lens paper. **BH-A3256337 includes: Helmet Mount-A3256368, LIF, weapon mount, eyeguard, tethering cord & compass **BH-A3256337-5 includes: LIF, weapon mount, eyeguard, tethering cord & compass