Tactical L4 G70 Low Profile Breakaway NVG Mount L4 Three Hole Shroud MICH / ACH Helmet. L4 G70 Low Profile Breakaway Mount allows firm attachment of a variety of NVGs to a MICH/ACH helmet using a three-hole shroud. Material Construction: Light Weight, Aerospace Grade Metal for NVG mount; Aerospace grade metal and polymers for L4 shroud. L4 Three Hole Shroud with lanyard and cup assembly fits MICH/ACH and Crye AirFrame helmets drilled with the standard three hole pattern. NVG mount designed to provide a solid mounting platform with multiple adjustment pointS. Accommodates AN/PVS-7A, ...