20 inch AR-308/AR-10 308 Win Rifle Length M-LOK Melonite Upper

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Special Price $639.99 Regular Price $859.99
In stock

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Don't see the exact configuration you want? No problem, just let us know. Most of the time we can customize with the parts we have just to your liking.


All our uppers have a Lifetime Warranty to the original purchaser. Some conditions apply - click here for details.

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Most of our uppers are built to order. Our most important goal is to get your order to you as quickly as possible without sacrificing quality. Please check the live status update on the banner above and/or on our homepage for current processing times.


We always specify the manufacturer of the major components therefore you know what you are getting. We only use quality components from well-known manufacturers.

All our uppers are carefully assembled and tested and ready to go out of the box. Every component is chosen to ensure a high quality upper is produced. Every upper is custom built to order and we go the extra mile to ensure the finished product is to your specifications.

This 308 Win upper starts with an AR-10 DPMS Gen 1 Style Guntec (2nd Gen) Billet Aluminum receiver, mated to a Ballistic Advantage 20 inch 308 Win, Rifle Length Gas System, 1:10 Twist, Heavy Profile, QPQ Nitride/Melonite treated barrel. Ballistic Advantage is one of the best barrel manufacturers in the industry and they produce high quality, accurate barrels. Guntec's 2nd Gen Receiver is a DPMS LOW SPEC made from billet aluminum where the forward assist has been moved further back to allow it to function properly. The new design is also slimmer and has a set screw pin for the forward assist. The Bowden Rail is a DPMS LOW SPEC, free floated system, M-LOK slots on all three sides, full length picatinny rail at the top, lightweight handguard. Barrel Nut is made out of solid steel to ensure a solid mounting system to withstand the recoil of the AR-10 system.

Bolt Carrier Group and Charging Handle is OPTIONAL. We offer a 308 Win BCG from WL Armory, Full Auto Profile, Properly Staked Gas Key, MP Tested, 8620 Carrier, 9310 Bolt, Nitride Treated and a Standard Charging Handle.

Comes with a Black Competition Muzzle Brake. This is an enhanced version of the popular style muzzle brakes. The baffles and ports are milled larger to drive pressure up and to keep the muzzle down more effectively.

Comes with an Adjustable Gas Block. Perfect if you are using a suppressor or just want to fine tune your system.



    • UPPER RECEIVER: Guntec USA 2nd Gen AR-10 Billet Aluminum, Type III Hardcoat Anodized Black with Forward Assist and Ejection Port Cover Installed

    • BARREL: 20 inch, 308 Win Caliber, 4150 Chrome Moly Vanadium Steel, 1:10 Twist, Heavy Profile, Nitride/Melonite Treated - made by Ballistic Advantage 

    • HANDGUARD: 15 inch AR-10 M-LOK Free Floated, Machined out of 6061 T6 Aluminum – made by Bowden Tactical

    • GAS SYSTEM: Rifle Length, Direct Impingement, Stainless Steel Tube

    • GAS BLOCK: Adjustable Low Profile Gas Block, Machined out of 4140 Steel

    • MUZZLE DEVICE: Black Competition Muzzle Brake with Crush Washer

    • 100% MADE IN THE USA

    • OPTIONAL: ADD a WL Armory 308 Win Nitride M16 Profile BCG and a Standard Charging Handle 


NOTE on COMPATIBILITY: Upper will fit most DPMS SPEC Gen 1 lower receivers on the market mainly Aero Precision, New Frontier Armory, Gibbz Arms, Noreen and etc. YES upper WILL work with a PSA PA-10 Lower but upper receiver sits a little higher than the lower receiver (SEE PICTURE BELOW). Upper is NOT compatible with Anderson Mfg's AM-10 308 Lower. Upper is NOT compatible with Armalite's AR-10 type lowers. This is just a guide and not a complete list of compatible and incompatible lowers.

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