Plum Crazy AR-15 Aluminum Complete Lower Receiver with Buffer Tube and Collapsible Stock - Black - What a deal. These high quality complete AR-15 lowers by PlumCrazy are ready to accept the upper of your choice. Just push 2 pins, slap in your favorite magazine, and Rock and Roll. we have both used and sold these extensively now and they perform great. Lightweight, affordable and tough as nails. You can pay much more for a complete lower but these will function as well as any of them. Each complete lower has a trigger group installed, a buffer tube, a pistol grip and a collapsible stock. They are ready to accept you favorite upper right out of the box. What a deal! Please note that you have have to be AT LEAST 21 in order to receive transfer of this firearm.