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Up for sale or trade is an SB Tactical 590-SBM4 pistol stabilizing brace. This is not a stock, it is a pistol stabilizing brace... So it can be placed on a Mossberg Shockwave or Mossberg Aftershock without violating any federal law regarding SBS (short barreled shotguns) 


These were made specifically for the Mossberg 590 Shockwave in 12gauge and 20gauge. It will not fit a Shockwave chambered for .410 shells.   It will also fit on a Maverick 88 cruiser as well but is designed specifically for the Mossberg Shockwave


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