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 shotgunNote: 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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