Brand new. Manufactured by Matrix Aerospace. CNC machined from a Cerro mil-spec 7075 T-6 aluminum forging. Mil-spec hard coat black anodized. Uses standard .250 diameter take down holes and standard .156 diameter fire control pins. Compatible with standard AR15 parts and upper receivers. Compatible with 5.56, 6.8 and 300 Blackout. Beautiful black satin/matte finish.