Fortis Manufacturing Rail Attachment Point Black. The accepts the Heavy Duty quick detachable sling swivels. Made of 6061 aluminum and hard coat anodized to a deep black finish. The allows you to attach your sling with a minimal footprint on your rail system and is rotation limited. Specifications for Fortis Manufacturing Rail Attachment Point RAP: Manufacturer: Fortis Manufacturing Condition: New Package Contents: Fortis Manufacturing Rail Attachment Point RAP Fortis Manufacturing RAP:Rail Attachement Point RAP Black