15 Inch Free Float Handguard Quad Rail for the AR-10 (E1 Series)

15 Inch Free Float Handguard Quad Rail for the AR-10

The Superior Weapons Systems rifle length free float tube is manufactured for the AR-10. This product is machined from an extrusion. The rails are to military specifications Mil-std-1913. T numbers on all rails.

Price: $311.00$390.00 + $16.00 S/H to lower 48 states.



Currently out of stock


Special Note: 15% restocking fee on returns/cancellations.

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Overall Length: 15"

Weight: 16 oz.


Free float tube provides a continuous top rail

Slots on the rail can be timed to slots on the receiver

Unique mounting system

Hardware Included:

Free Float Tube

Barrel nut wrench

Barrel nut (threaded portion) (2)

(6) Cap socket head screws

Download E1 Series Installation Instructions

This model will fit the DPMS platform, but when ordering you must add to the notes on the transaction that it is for a DPMS and send drop us an email saying you bought it for a DPMS platform (the threads are different between the two guns)

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.

A low profile gas block will need to be added to the parts. You will need to mount either the AR-10 Carbine or the AR-10 rifle E1 rails, as the gas system is shorter on the DPMS guns.




Our hand guard rails are machined to the high side of tolerance and there are some items that it will not fit.

Our rails are not suitable for .936 diameter barrels due to the small inside diameter.