Shell carrier for the 12 gauge Mossberg 500 / 590 shotgun; Holds seven (7) 12 gauge rounds; Made of a precision molded polymer with an aluminum mounting plate; Will not contact or interfere with the pump action forend when used with length forends; Allows for the individual tension adjustment for each shell allowing the user to fine tune the sell carrier for specific ammunition; Lifetime Warranty protects against manufacturer defects; Made in USA