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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.
cc-gun-icon INCREDIBLY PRECISE
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.
cc-hand-icon RIDICULOUSLY EASY
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.
cc-thumbs-icon 100% SATISFACTION GUARANTEED
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.

AR 15 Build Kits

  • DPMS 10.5" 556 Quad-Rail Upper AR-15 80% Build Kit
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    DPMS 10.5" 556 Quad-Rail Upper AR-15 80% Build Kit

    $680.46
  • DPMS 7.5" 300AAC Blackout M-Lok Upper AR-15 80% Build Kit
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    DPMS 7.5" 300AAC Blackout M-Lok Upper AR-15 80% Build Kit

    $700.12
  • DPMS 7.5" 300AAC Blackout Quad-Rail Upper AR-15 80% Build Kit
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    DPMS 7.5" 300AAC Blackout Quad-Rail Upper AR-15 80% Build Kit

    $700.12
  • DPMS 10.5" 300AAC Blackout Quad-Rail Upper AR-15 80% Build Kit
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    DPMS 10.5" 300AAC Blackout Quad-Rail Upper AR-15 80% Build Kit

    $678.52
  • DPMS Complete 16" 5.56 M-lok AR-15 100% Build Kit - Texas Edition
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    DPMS Complete 16" 5.56 M-lok AR-15 100% Build Kit - Texas Edition

    $707.76
  • DPMS Complete 16" 5.56 M-lok AR-15 100% Build Kit - Ambi Edition
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    DPMS Complete 16" 5.56 M-lok AR-15 100% Build Kit - Ambi Edition

    $724.15
  • DPMS Complete 16" 5.56 Quad-Rail AR-15 100% Build Kit - Texas Edition
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    DPMS Complete 16" 5.56 Quad-Rail AR-15 100% Build Kit - Texas Edition

    $686.77
  • DPMS Complete 16" 5.56 Quad-Rail AR-15 80% Build Kit
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    DPMS Complete 16" 5.56 Quad-Rail AR-15 80% Build Kit

    $598.16
  • Radical Firearms Complete 16" AR-15 80% Build Kit
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    Radical Firearms Complete 16" AR-15 80% Build Kit

    $799.99
  • Aero Precision Complete 16" AR-15 80% Build Kit
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    Aero Precision Complete 16" AR-15 80% Build Kit

    $1,149.99
  • OUT OF STOCK
    Complete 16" .223/5.56/300BLK AR-15 80% Build Kit
    SOLD OUT

    Complete 16" .223/5.56/300BLK AR-15 80% Build Kit

    $710.99 - $748.98
  • OUT OF STOCK
    Complete 16" 7.62X39 AR-15 80% Build Kit
    SOLD OUT

    Complete 16" 7.62X39 AR-15 80% Build Kit

    $611.99 - $724.98
  • OUT OF STOCK
    Complete 10.5" 5.56/300BLK AR-15 Pistol 80% Build Kit
    SOLD OUT

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

    $635.99 - $678.97

WHAT IS AN AR-15 BUILD KIT?

The AR-15 rifle build kit includes absolutely everything that you need for completing an AR-15 style rifle. Choose your rifle length, desired caliber (5.56/300BLK), and customize to your heart’s content! This takes all the parts hunting out of building a new rifle from an 80% lower. This way you get an entire AR-15 build shipped to your door, and all that is left for you to do is mill out and assemble the lower receiver. 

Can't figure out which caliber you want to go with? Check out our blog on 5.56 vs 300 Blackout? 

WHY CHOOSE AN AR-15 BUILD KIT?

For those not comfortable installing all the AR-15 components together themselves, our in-house Armorer will do it for you!

With 80 Percent Arms build kits we guarantee these parts’ compatibility with each other and you get to fully customize your AR-15 rifle build, interchangeably selecting high quality parts with just a click of a button. Instead of hunting down these parts separately, save your time and money by designing a complete rifle at our one-stop shop. 

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