Beretta A400 Xplor Action 20 Gauge Semi Automatic Shotgun with Bronze Cerakote Finish for sale. Beretta’s A400 Xplor Action is a semi-automatic shotgun that will be equally at home on an upland, duck or deer hunt as well as at the clay range. The low profile, gas-operated, action features Beretta’s Blink technology, and is capable of firing four shells in less than one second. It has a blued steel barrel and a bronze-colored receiver. The walnut stock has a Micro-Core buttpad, while the fore-end features the Beretta Trident logo. This 20 gauge has a 28″ barrel.