Spike's Tactical STSB920, Semi-automatic, Lower/Upper Set, 9MM, CNC Machined from 7075 Billet Aluminum, Black Color, Anodized Finish, Flared Magwell, Last Round Hold Open feature, Includes KNS Pins, Ambi Safety, Mag Release, Takedown Pins, and Buffer Retainer Pin STSB920 Available to order on-line. Ships in 5-14 days $589.50