Introduced 2018. Optimized to run lighter loads, the gas system also includes a valve system that decreases the pressure of more powerful shells. Additionally, the A300 Sporting’s larger, heavier walnut stock dampens kick. 30-inch barrel, widened rib, front and mid beads, palm swell on the grip, and extended chokes. Three-inch-chamber 12-gauge comes with three MobilChoke Victory tubes (IC, M and F).