ACR 5.56 Lightweight lower receiver made of 6061 Aluminum.

Depending on what parts are used to assemble, the Lightweight G1556 lower is approximately one ounce more than a factory plastic lower assembled

Features Wire EDM cut flared magwell.  Allows for most AR-15 Trigger guards and pistol grips to be used with the Acr.

Uses all factory parts for assembly with the exception of the trigger box.  Required trigger box included.

**Requires new style safety core which came with the final generation Acr’s.  These safeties feature a metal core and levers that bolt in from the sides.  Can be purchased separately.**

Includes lightweight trigger box