The Mossberg 590A1 is an ideal platform for personalizing a pump-action shotgun, says Mike Shain of AIMPRO Tactical. Shain is one of several shops that offer action jobs, Magnaporting, accesorization and cleaning, polishing and refinishing of police scatterguns. Vang Comp and Wilson Combat are two others that offer shotgun modifications. For less than $250, Shain can reduce felt recoil and muzzle jump, giving operators a shot pattern of 4 inches or less from 50 yards. "What can we do to hot rod this gun," Shain asks, not needing an answer. "It's a great gun out of the box, but how can we squeeze every last drop of performance out of this gun."