Mossberg's 930 Special Purpose Shotgun features a self-regulating gas system that vents excess gas to aid in recoil reduction and eliminate stress on critical components. To complete the package, each Mossberg 930 includes a set of specially designed spacers for quick adjustment of the horizontal and vertical angle of the stock, bringing a custom-feel fit to every shooter. The receiver-mounted safety is convenient for right or left-handed users. A protruding chrome cocking-indicator button is strategically placed in the front inner-edge of the trigger guard, making it easy to see and feel when the weapon is cocked or un-cocked. This model also features a drilled and tapped receiver, factory-ready for Picatinny rail, scope base or optics installation.