Radian Weapons AX556 Ambidextrous Billet AR-15 Lower Receiver

Manufactured by Radian Weapons
SKU: R0166
MPN: R0166
Manufactured by Radian Weapons
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NOTE: Limit 20 per household. Quantities exceeding 20 will not allow checkout.

Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal-Firearm License holder.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers.
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to ffl@primaryarms.com.



Radian Weapons AX556 Lower Receiver is a fully ambidextrous lower receiver for AR-15 style firearms and perfect for your next build. It is a strong and durable lower machined from billet 7075-T6 aluminum with an integral trigger guard and flared magazine well for optimal performance. The AX556 boasts a Self-Adjusting Receiver Tensioner (SART) spring-loaded plunger to reduce upper/lower wobble. The ambidextrous safety selector, left-side magazine release and right-side bolt release offer extreme versatility. In addition, the AX556 features the patented A-DAC (Ambidextrous Dual Action Catch), which allows right-handed shooters to easily lock the bolt to the rear without taking their hand off fire control. To use the A-DAC, simply pull the charging handle to the rear, depress the right-side magazine release button, then release the charging handle. This Radian Weapons lower features proprietary extended bolt catch, left-side magazine release paddle, right-side magazine release button, right-side bolt release paddle and hammer pin. If you are looking for an ambidextrous lower receiver for your next AR build, the Radian Weapons AX556 should certainly be on your short list of options.

  • 7075-T6 aluminum construction 
  • Integral trigger guard 
  • Flared magazine well
  • SART (Self-Adjusting Receiver Tensioner) 
  • Spring-loaded plunger 
  • Radian Talon 45/90 ambidextrous safety selectors (long/short)
  • Enhanced takedown pin set

Radian Weapons design and manufacture the most innovative, professional-grade firearms and components for the American consumer. They do so by implementing extremely high-quality standards so that every part that leaves the factory floor will function as intended without fail. Radian Weapons stands by their products and guarantees that customers can expect precision quality and consistent accuracy with their products.
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BrandRadian Weapons
Caliber MarkingMulti-Caliber
FinishHardcoat Anodized
Receiver Material7075-T6 Aluminum
Trigger Pin DiameterMIL-SPEC .154

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