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.

Type III Hard Anodized Billet AR-15 80% Lower Receiver - Ambi - Blemished

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We received permission from the Federal Court to sell this item. State Restrictions apply. READ MORE.

These are AR-15 6061 Type III Hard Anodized Ambidextrous Billet Lowers but there are some visual imperfections that do not meet our standard of quality. Aside from the issues of being off-color or having marks, they are perfectly in mil-spec and functional lower receivers.

Blemished products may include - plating inconsistencies, color variations, scratches, dings or the magwell was re-broached. 

These do not qualify for bulk purchase discounts, due to the fact they are already highly discounted.  The lower replacement plan discount code does not apply to these as well.  

Blemished lowers are a final sale item only.  


With freshly contoured lines, and packed with features, the Ambi 80% AR15 lower isn't just the best looking 80% lower receiver available, it's the most functional as well. From a right-side bolt release, to multiple adjustment screws to tune the fit and function of your lower to your liking, we've not only given you all the features you want, we've done it at the same weight as our classic lower.  


  • Ambidextrous bolt release to aid in the reloading process

  • Receiver tension screw to eliminate play between receivers

  • Trigger Pre-Travel Take-Up screw to help eliminate play in triggers for a cleaner pull

  • Threaded rear takedown pin detent spring hole for easier building
  • Full mil-spec part compatibility ensures maximum rifle customization

  • Withstands the harshest punishment from any situation using ultra-tough design, precision machined from aircraft-grade billet aluminum for superior strength

  • Broached, flared mag well aids with faster, easier magazine reloads

  • Heavy-duty, integral trigger guard enables winter use with gloves

  • Unique, threaded bolt catch installation eliminates the need for a punch or special tool

  • Rear takedown lug pocket completed

  • All Ambi Hardware Included, including both tension screws!


How easy is it to build? Check out the instruction manual and see for yourself! Any questions, please reach out to our customer service team!


We manufacture Type III Hard Anodized AR-15 Lowers using aerospace grade 6061 aluminum which is more resistant to corrosion and is much easier to mill than any other alloy used to make lower receivers. Not compatible with Gen 1 AR-15 Easy Jig® & Drill Press Jig. Compatible with all of our patented Gen 2 and Gen 3 Easy Jigs - secure yours today!

Shipping Restrictions: This item is restricted from shipping to New Jersey, New York, Hawaii, Connecticut, Rhode Island, Washington D.C., Maryland, Illinois, California, Washington, Allenspark Colorado , Coal Creek Canyon Colorado , Eldora Colorado , Eldorado Springs Colorado , Gold Hill Colorado , Gunbarrel Colorado , Hygiene Colorado , and Niwot Colorado, and Denver Colorado.