Now All Tubes Include T-numbers Engraved On The Slots When Ordered.

Notice to owners of DPMS 308 guns: The new uppers on your guns is about .060” lower from centerline of barrel than earlier models. The E1 or earlier rail systems will not mate up or align to the top of your upper receiver. Please be aware of this before ordering a rail system. Also note that no other rail system will work with your upper.