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.

Complete 10.5" 5.56/300BLK AR-15 Pistol 80% Build Kit

$635.99 - $678.97
Barrel Selection for EPA-AR15PBK
Muzzle Selection for EPA-AR15PBK
Calculated at Checkout


Norton Shopping Guarantee

This 80-percent build kit contains all the necessary high-quality parts to build your AR-15 Pistol at home! We removed all of the guesswork and packaged the necessary parts to build your AR-15 Pistol in one, easy to purchase, complete kit. Buy as a complete AR-15 Pistol upper kit and save money versus purchasing the necessary items separately! This 10.5" AR Pistol build kit comes standard with our great looking 10" M-LOK handguard which will offer a variety of attachment options in a perfect blend of form and function.

This Kit Contains:

  • 10.5" AR-15 Pistol Upper Receiver
  • Black Nitride .223/5.56/300 BLK Bolt Carrier Group
  • Standard Charging Handle
  • Pistol Buffer Tube Kit with Foam Pad Cover
  • Billet Aluminum 6061 AR-15 80% Lower Receiver
  • Mil-Spec AR-15 Lower Parts Kit

About the options:


Choosing between the two most popular calibers for an AR15 isn't always an easy choice. However, it really comes down to what you want to do with it. Out of such a short barrel, the .300BLK will carry more energy, though the 5.56 will move quicker, shoot flatter, and cost you less. For a more in depth look, take a look at our blog post on the most popular AR 15 calibers. 

Muzzle Device
A2 Style Flash Hider or Compact Muzzle Brake? While mostly a matter of looks or preference, 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 state law. 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 accuracy. More Questions? We have an article on muzzle brakes just for you
Don't forget to get a pistol-brace for this build.
Shipping Restrictions: This item is restricted from shipping to California, Connecticut, New Jersey, New York, Washington D.C, Washington, Hawaii, Oakland City, Unincorporated Boulder County Colorado (Allenspark, Coal Creek Canyon, Eldora, Eldorado Springs, Gold Hill, Gunbarrel, Hygiene, and Niwot), City of Denver Colorado, City of Philadelphia Pennsylvania, Maryland, Illinois, and Rhode Island