And the Shockwave isn't the only smoothbore getting a retro facelift. Mossberg is also releasing the Retrograde Persuader, which harkens back to the days when law enforcement used wood furniture Model 500s before polymer stocks came along. It has a dark walnut buttstock and corncob ribbed forend. The Retrograde 590A1 is inspired by the trench guns of World War II featuring the same wooden furniture plus combat sights, a bayonet lug, and a vented heat shield on the barrel. Being a 590A1, it also features a thicker barrel and a more rugged metal trigger guard and safety switch.