All Mossberg 930 shotguns feature a self-regulating gas system that vents excess gas to aid in recoil reduction and eliminate stress on critical components. 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. Safety and safe handling is of paramount importance in special purpose firearms, and the 930 was engineered with that in mind. The receiver-mounted safety is convenient for right or left-handed users; simply push the button forward to take the weapon off safe. 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.