Bond Arms Backup, Derringer, 9MM, 2.5 Barrel, Steel, Stainless Finish, Rubber Grips, Fixed Sights, 2 Rounds, With Trigger Guard BABU9MM Designed for easy concealment when you need it, the Backup features a textured frame and bead-blasted anti-glare barrel designed to fire powerful 9MM rounds with its 2.5 in. barrel.