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Stripped Upper Receiver

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  • .308 Dust Cover / Ejection Port Cover Assembly

    .308 Dust Cover / Ejection Port Cover Assembly

    $7.99

    US-made. Includes dust cover, rod, and spring. A simple, quality .308 dust cover for finishing your custom, stripped .308 upper receiver. Fits all DPMS-patterned LR-308 / AR-10 receivers. Made from billet (6061-T6) aluminum, and finished with a mil-spec anodized finish to match virtually all anodized black receivers in color and finish.    

  • Sale! AR 15 Dust Cover (Aluminum)

    AR 15 Dust Cover (Aluminum)

    Original price was: $6.99.Current price is: $2.99.

    Quality, US-made AR-15 dust cover assembly. AND it’s the CHEAPEST! Period! This mil-spec AR 15 dust cover includes a rod and spring for installation. The cover is finished with a standard black anodized coating, ensuring it matches all standard, stripped AR-15 upper receivers in color and finish.

  • AR15 Forward Assist Assembly

    AR15 Forward Assist Assembly

    $9.99

    Mil-spec AR15 forward assist assembly. Includes forward assist, spring, and roll pin.

  • Sale! AR15 Low-Profile Gas Block - .750"

    AR15 Low-Profile Gas Block – .750″

    Original price was: $14.99.Current price is: $11.97.

    Every gas-operated AR (those that don’t employ a piston system) needs a gas block of some type to cycle between shots. If you’re building an old-school or retro style AR, it may have a fixed front sight that doubles as the gas block or some fold-up variant thereof. But if it’s any number of countless…

  • Sale! M-LOK Handguard Barrel Nut

    M-LOK Handguard Barrel Nut

    Original price was: $12.99.Current price is: $4.97.

    Includes all the hardware needed to mount an M-LOK or Keymod handguard. 7075-T6 aluminum Mil-spec AR-15 barrel nut threads (1.25″ x 18 TPI) 1.375″ Outer Diameter 2 Hex Nuts and Bolts

  • Sale! UTG® Quick Install Dust Cover - .223/5.56, Black

    UTG® Quick Install Dust Cover – .223/5.56, Black

    Original price was: $9.99.Current price is: $2.97.

    Installing a dust cover onto your AR’s upper receiver can be a pain. If you’re starting with just parts, you need to install the C-clamp onto the rod without launching it across the room and never seeing it again. Then you thread the rod through the first side of the cover, then the spring, then…

One mil-spec, forged, stripped upper receiver. It’s all you need.

Well, okay, you’ll probably also want an M16 BCG (like this excellent nitride, C158 bolt carrier) and a quality, free-float handguard (like our custom, lightweight M-LOK units). And yeah, you’ll probably want a lower parts kit and a lower receiver, such as our O.G. 80% lowers. The point is, you want to build an AR truly piece by piece. And we’re happy to afford you a perfect M4 flattop clone stripped upper like the unit you see here. It provides that classic Colt profile with a Picatinny rail on top, minus the $400 price tag for that ole’ pony roll mark.

A Truly “Stripped” Upper

A lot of uppers advertised as stripped units still come with the dust cover and forward assist installed. While some enjoy the convenience, others don’t like the fact that it takes away from your custom build. If you want to install a custom dust cover and FA, this is the properly stripped upper receiver you want. Plus, it’s more affordable than those other units.

Trying to build for the first time? Read the Types of AR-15 Upper Receivers Compared.

Type III Hardcoat Anodized

This stripped upper ships with a perfect, mil-spec, Type III Hardcoat finish. Whether you grab one of our in-house 80% lowers and handguards or grab some other custom parts to complete your AR, you can be happy knowing the finish on this receiver will match just about any other retail AR parts that also come with a mil-spec anodized finish.

Ready to assemble?

This upper receiver ships with conventional 1.25×18 TPI barrel nut threads which are properly cut for the indexing pin on your barrel’s extension. This makes your barrel and handguard install guesswork-free. All you’ll need are the appropriate gunsmithing tools to complete your upper assembly’s installation:

Tools required:

  • Roll pin punches (for gas block and tube)
  • Barrel nut wrench extension for torque wrench
  • Torque wrench measuring at least 40-60 lb. ft.
  • Upper receiver vise block or receiver action rod

Check out our Gunsmithing Tools for everything you need!

Here’s our instructional guide on how to assemble your upper with a barrel, handguard, and gas system.

DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At 80-Lower.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

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