IS LOWER FROM ALUM.BILLET

No its high tech plastic Multi-Caliber, Mil-Spec, AR15 Lower Receiver, manufactured in the USA of a high impact proprietary composite polymer

Nope, high speed plastic it is.

Hi Damon, this is not aluminum. Made from space age materials, the AR1 eXtreme lower is made from an impact resistant polymer blend selected specifically for the construction of firearms. The lower is so strong it can be used with any mil-spec upper chamb