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
Fastest Follow-Up Shots of Any Shotgun