Daniel Designs, Remix from PatriotDad79 AR-15 Wall Mount with Hinge V2 (parts pre-assembled). I broke it apart and added some spartan helmet and ΜΟΛΩΝ ΛΑΒΕ quote on the parts. The reason for disassembling is for smaller Resign printing capability and fewer chances of parts curing to each other.

Update: 9-14-22
Found the angle of the hinge made the mounted AR hit the wall, so updated file pt1 to have a 90-degree angle.