Unissued, NIB USGI Cover for M61 Vulcan 20mm Gun/Mount This is an unissued, new in box USGI cover for the M61 Vulcan 20mm. Cover is made of Type II, Class 3 ,self-extinguishing polyethylene over nylon with leather reinfoced corners, metal snaps and sleeve for barrel. NSN is 1005-01-150-5869, Part number 9352711
