Install your P320 FCU (firing control unit) into our newly developed AXG (Alloy XSeries Grip) metal grip module to experience the unique blend of style and shootability of a classic metal frame pistol. – Precision machined with deep undercuts and an extended beavertail for an ergonomic comfortable fit the AXG grip module is fitted with interchangeable Black G10 grip panels from Hogue and a Medium Black back strap. – Requires the 9mm .357 SIG and .40AUTO slide and barrel.