Choose between a Black Collar Arms Pork Sword Chassis with folding Stock Option and SD Handguard or a custom-inletted Grayboe Ridgeback Composite Stock with Grayboe detachable magazine bottom metal.

Pork Sword Chassis setup: 7075 aluminum, folding stock, 2.1 pounds. More info HERE.
Grayboe Ridgeback setup: fiberglass epoxy composite, 4.1 pounds with DBM. More info HERE.