XTS 2 pc Carbine Quad Rail Black XTS MT021. Made with a hard coat anodized 6061 true aircraft grade aluminum material the XTS AR Carbine Length Quad Rail will supply you with years of reliable and efficient use. For a great way to ensure that you are using one of the best quad rails the shooting industry has to offer choose the XTS Carbine Length AR Quad Mounting Rail. Specifications for XTS 2 pc Carbine Quad Rail: Manufacturer: XTS Color: Black Fabric/Material: 6061-T6 Aluminum Gun Rail: Picatinny Gun Make: AR Platform Gun Model: M4 AR-15 Included Accessories: 4 Screws Condition: New Quantity: 1 Attachment Type: Screw Features of XTS AR Quad Mounting Rail/Hand Guard - Carbine Length: AR Hand Guard/Quad Rail Carbine Length 6061 True Aircraft Aluminum Hard Coat Anodized Easy to Install at Vertical Position Package Contents: XTS 2 pc Carbine Quad Rail XTS XTS MT021: 2 pc Carbine Quad Rail Black