From The Manufacturer/Wikipedia/People Smarter Than Us:
This new 9mm pistol is a double-action, striker-fire designed platform that incorporates an ergonomically driven polymer double stack frame with a stainless steel slide. With extensive research on the form and function of the tactile-enhanced grip, the operator will find the design enhances control, while providing consistent hand placement. The flared magwell aids in fast and reliable reloads while the extended magazine base pad provides a secure grip during loading, handling and shooting the DB FS Nine.