More Details - ProMag Mossberg12Ga 7 5/8” Slide ActionTube Assembly
PM194 allows the fitment of alternate fore-ends to Mossberg 500*, and Maverick 88*, pump-action shotguns where the action bars are molded into the fore-end, giving the shotgun owner additional options for the fitment of fore-end rails and accessories.
NOTICE: The PM194 is required for the use of PM111F, and AA500/AA500SC, Tactical Shotgun Stocks, and the PM168 Tri-rail Fore-end, with Mossberg 500* shotguns manufactured post-2006, and all Maverick 88* shotguns.