• Fully ambidextrous lower receiver
• Lock bolt back by holding down the mag release
• Machined from 7075-T6 aluminum 
• Self adjusting tensioner for tight fit with upper
• Ambi safety, takedown pins, bolt release, hammer pin and mag releases included
• Needs buffer system and trigger to complete 
• Pattern on magwell matches PMags

The Radian AX556 is a fully ambidextrous lower receiver for AR15-style firearms that has controls for both righties and lefties.  In addition to the Talon Ambidextrous Safety Selector, left-side magazine release, and right-side bolt release, 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 hold the bolt back using the A-DAC, simply pull the charging handle to the rear, depress the right-side magazine release button, then release the charging handle. This feature is excellent for righties, as you can avoid having to wrap around the other side of the receiver to lock the bolt open. 

For more info, visit Radian