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.

SMITH DEFENSE - AR-15 Mil-Spec Lower Parts Kit

Calculated at Checkout
Norton Shopping Guarantee

The Smith Defense AR-15 Mil-Spec lower parts kit comes complete with an A2-style pistol grip and Mil-Spec trigger guard kit.  This kit meets the highest quality standards in the industry and is made in America. Featuring ground and polished surfaces, it comes with everything you need to start your custom build, from start to finish. Whether you're upgrading your AR-15, or completing a stripped lower, our kit offers everything you need in one affordable package.

Complete Your AR-15 Build Quickly

The Smith Defense AR-15 lower parts kit includes all Mil-Spec quality parts and components to complete your 80% lower receiver. Give your next AR-15 rifle build a foundation of proven excellence for long-lasting performance and reliability with this complete lower parts kit. 

The Smith Defense AR-15 Mil-Spec lower parts kit includes: 

  • Mil-Spec fire control group with polished and ground sear surfaces
  • Mil-Spec pin kit
  • Mil-Spec A2 lower build kit styled pistol grip
  • Mil-Spec bolt catch
  • Mil-Spec trigger guard
  • Mil-Spec magazine catch
  • Mil-Spec buffer retainer kit
  • Mil-Spec selector kit

Get all the parts you need for superior lower receiver finishing. If you’re looking to build an AR-15 that delivers the ultimate superior shooting experience for a hunting, target-shooting or self defense rifle, look no further than the 80% Arms AR-15 lower parts kit. 

Order Online today! As an industry-leading supplier of quality AR-15 build parts, you can count on us to deliver the best quality custom build parts and kits at the most competitive prices in the market.

Our AR-15 Mil-Spec lower receiver parts kit combines true reliability, world-class quality and durability.


Finish your AR-15 lower receiver easily and quickly by order this AR-15 lower parts kit from us.