The Beretta A400XP is a gas-operated semi-automatic shotgun. At some point we have either seen or heard how “picky” semi-auto shotguns are. However, having a gas-operated system greatly reduces this risk. Why? Simply put, it’s because the gas-operated system relies on the gas dispersed by the shot instead of the actual recoil from the load like an inertia driven system would do. This allows even the lightest of loads to still cycle properly.