cc-settings-icon BUILD AT HOME
80% Arms sells AR-15 and .308 80% Lower Receivers, 80% Lower Jigs and other accessories which allow you to legally build a firearm at home in most states.
We utilize state of the art 5-axis CNC machines to mill all our .308 and AR-15 80 percent lower receivers to incredibly precise tolerances using premium billet aluminum.
We also offer our patented AR-15 and .308 Easy Jigs® which is the first 80% lower jig that makes it ridiculously easy for a non-machinist to finish their 80% lower in under 1 hour with no drill press required.
Products manufactured by 80% Arms carry a lifetime warranty against manufacturing defects. We will promptly replace or repair any product that we determine to be defective.

16" .223/5.56/300BLK AR-15 Upper - Customizable

$504.00 - $556.98
Barrel Selection for 16" .223/5.56/300BLK Upper
Muzzle Selection for .223/5.56/300BLK
Handguard Selection
Calculated at Checkout


Norton Shopping Guarantee


To compliment our 80 lowers, we offer AR15 complete uppers assembled in-house which will work perfectly for your next build. This complete upper features a free-floating handguard and barrel of your choice chambered in either .223 or 5.56mm NATO.

Each AR15 complete upper from 80% Arms includes a preinstalled forward assist, dust cover, bolt carrier group, and charging handle.

All of our uppers are assembled with parts that are proudly made in the USA. In our QC inspections, we also make sure that each complete upper is torqued to Mil-spec standards so that they’ll be plug-and-play ready for your next AR15 lower to pair.


  • 16” Heavy Barrel Profile, Parkerized Finish

  • .750” Fixed Gas Block and Gas Tube

  • A2 Style Birdcage Flash Hider

  • 12”/15” M-LOK Handguard

  • 7075-T6 Forged AR15 Upper Receiver (Forward Assist/Dust Cover Installed)

  • HP/MPI Tested Bolt Carrier Group, Black Nitride Finish

  • Mil-Spec Charging Handle

  • Optional Upgrade: Compact Muzzle Brake 


Muzzle Device

A2 Style Flash Hider or Compact Muzzle Brake? For some it may be a matter of looks or preference, but some states have outlawed A2 Style Flash Hiders or consider them to be "evil features", contributing toward what may or may not be considered an "assault rifle" under the definition of various gun regulations. Be sure to read and understand your local laws. 

Aside from the legality, there are benefits in looks and performance when choosing a Compact Muzzle Brake. Muzzle brakes, besides looking cool, divert the gasses exiting the barrel in such a way that reduces recoil and muzzle rise, and can improve follow-up shot speed. Check out our blog on muzzle brakes for more information.

.223 Wylde or 5.56mm NATO?

A common question, with a simple answer. Both the barrel options included in this complete 16-Inch AR-15 build kit will safely shoot 5.56mm NATO or .223 Remington ammunition. For some, it's a matter of preference. However, the .223 Wylde barrel will shoot .223 Remington with better accuracy than a barrel chambered in 5.56mm NATO, but can also withstand the pressure load of 5.56mm NATO. The popularity of .223 Wylde chambered barrels as somewhat of a "hybrid" chamber has grown in the past years, bringing the price point of the .223 Wylde down to that of the common 5.56mm NATO barrel. To learn more you can read our blog on .223 vs 5.56: What's the Difference?

Stainless or Parkerized?

Again, this is much a matter of preference and the general look desired. In this complete 80% AR-15 build kit, both the Parkerized high-carbon steel and 416R stainless steel barrels will provide years of accurate performance. Parkerized barrels have a metal finishing process applied to provide a long lasting and durable flat black surface finish. Stainless Steel barrels are constructed of 416R Stainless Steel and provide the satin silver look that many enthusiasts prefer.

Shipping Restrictions: 

We do not ship this product to the following states: California, Colorado, Connecticut, Hawaii, New Jersey, New York, Rhode Island, and Washington D.C.