Will a 590 stock fit a shockwave?

Will a 590 stock fit a shockwave?

Yes, this will fit the Mossberg 590 Shockwave. Please be aware that adding a stock to the Shockwave may result in a change in the firearm’s legal status.

What size shells does a Mossberg 590A1 shoot?

The 590A1 action can accomodate 3-inch shells, and the lightweight alloy, anodized receiver features a large ejection port on the right side.