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** THIS KIT UPGRADES LEGACY 12-GAUGE MOSSBERG 500, 590 OR MAVERICK 88 FIREARMS TO 590S FUNCTIONALITY **
This kit contains a Patent Pending Universal Cartridge Adapter and Low-Drag No-Snag Magazine Follower which allows cycling of 1-3/4" Minishells up to 3" Magnums 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 all Mossberg 12-Gauge pump-action firearms with machined grooves in the receiver (refer to the picture or the installation video to confirm your firearm's compatibility).
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 the manufacturer if problems persist.
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