The A400 action is truly revolutionary in the history of the semiautomatic shotgun. With Beretta's proprietary Blink technology, it shoots 36% faster than any other system, meaning that your follow-up shots will always be faster than any turkey, deer, duck or clay target. Thanks to its 3" chamber, it can fire any type of 12 gauge shell, giving the A400 the versatility of a do-it-all shotgun. The Kick-Off Mega system reduces recoil by up to 70%. The Optima-Bore HP configuration offers the best ballistic performance available, even with steel shot. The Micro-Core recoil pad is softer and lighter than rubber and expands its surface area on the shoulder for secure and precise support. Every A400 Xtreme Unico KO comes with a dedicated case with stock drop spaces, Beretta oil, quick detachable swivels, and three choke tubes with a wrench.