The United Shield International ARC Rails are made of glass reinforced nylon and are shaped to fit the Spec Ops and ACH/MICH (Med. and Large.) helmets that have been drilled to the ACH specification.
The Rails come fitted with a slide adapter for mounting equipment.
When fitted to the helmet, they offer a low profile and have been designed with radius corners in order to reduce snag points.
The rails also have goggle and gas mask attachment points as well as an additional vertical rail, as opposed to their counterpart, Picatinny Rails.