For sale is a new in box Mossberg 590 Shockwave SPX in 12 gauge. The Shockwave SPX features a receiver-mounted side saddle with shellholder units/removable top rail, barrel heat shield, and a spiked breaching muzzle. Also includes the features that have made Mossberg pump-actions the choice for millions worldwide: ambidextrous safety, dual extractors, positive steel-to-steel lockup, twin action bars, and a smooth operating anti-jam elevator. This shotgun comes with all factory items including the box, manual, and lock.