FEATURES-For Mossberg 500, 590 DA-12 gauge only-Unbreakable, corrosion-resistant polymer shellholder-Rugged, aluminum backing plate-Easy mounting, no gunsmith design-Adds 6 extra rounds on your shotgun
Note: Some field grade shotguns may require a modification to the shotgun's forend. Shotguns using the TacStar pistol grip forend do not require modification
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