Universal Minishell Adapter/Mag Follower Kit for Mossberg Pump Shotguns

Read the "Truth About Guns" Gear Review here! This kit essentially provides a conversion to 590S functionality, but in a more robust design.  It contains our patented Universal Cartridge Adapter and low-drag no-snag Magazine Follower which allows smooth cycling of 1-3/4" Minishells up to 3" Magnum cartridges in the same magazine.  The adapter is constructed from vulcanized thermoplastic rubber, and the follower is machined from solid 6061-T6 billet aluminum.  This kit is compatible with any Mossberg 12-Gauge pump-action firearm with a 3" Chamber and machined grooves in the receiver.  Please refer to the picture below or the installation video below to confirm your firearm's compatibility.  Not compatible with 590R. Please note there may be a short break-in period for some adapters after installation.  Cycle a few magazines of full-size shells if you initially experience issues with 1-3/4" shells, please reach out to us if problem persists.   *The Cartridge Adapter and Magazine Follower