#html-body [data-pb-style=EXBOHXT]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll}The A400 is a gas-operated action that was built for speed, reliability and versatility. The A400 action is self-cleaning, so it requires much less maintenance than any other shotgun you'll ever own. When you take this gun apart you'll be amazed by the intuitive simplicity of the tool-free field-stripping process and by what little maintenance the A400 requires. Low Profile Action Low-Recoil Self-Cleaning Piston 3 Choke Tubes Extended Charging Handle Optima Bore HP Steelium Plus Barrel Real Tree MAX-7 Camo Finish