OSdream Tactical Helmet Aluminum or Nylon Devgru Style Mich VAS Shroud NVG Helmet Mount Aluminum or Nylon Two Choices Fits all FAST ACH, MICH, PASGT and Lightweight Marine Helmets with the MARSOC / WARCOM 3-hole pattern Aluminium or nylon two materials for you to choose from Ideal for replacing the original helmet "hook and strap" mounting system Can be used for mounting NV devices (requires NV mounting arm, not include in package)Can apply a variety of PVS series night vision adapter (PVS14 7 18 15, and so on) 100% new quality assurance