Titanium AR-15 lower-receiver manufactured by the now defunct Olympic Arms. The last time these were available for sale was October 2018. New condition. Receiver has been bead-blasted but is otherwise unfinished. Please see photos for actual finish condition.

Photos are of the actual lower that is for sale.

From Olympic Arms:
"This Titanium lower receiver is built to Mil-Spec dimensions (minor fitting may be required), and designed as a replacement for a standard AR-15 lower receiver. Finished with a bead blast, this lower is significantly stronger than its aluminum counterparts, but adds very minimal additional weight to the lower.