Unlike any other pistol in its class, SIG Sauer’s P320 RX Pistol features a unique modular-grip frame and removable fire-control assembly that allow you to change calibers, sizes and fit for a truly custom experience. A three-point-takedown safety system will not allow you to break down the firearm with the magazine in the gun or without the slide locked to the rear, making it difficult for an accidental discharge to occur. Modular grip frame accommodates a wide range of hand sizes. SIGLITE® night sights provide target acquisition in any lighting situation. Double-action striker-fire operating system. Quick takedown with no tools required. Includes SIG Sauer ROMEO1 mini reflex sight pre-installed and zeroed.