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** THIS KIT UPGRADES LEGACY12-GAUGEMOSSBERG 500, 590 OR MAVERICK 88 FIREARMS TO 590S FUNCTIONALITY **
This kit contains our 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 Mossberg12-Gaugepump-action firearms with machined grooves in the receiver (refer to the picture or the installation video to confirm yourfirearm\'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 us if problem persists.
