ProMag Adjustable Buttstock Kit for Mossberg 500

Upgrade your Mossberg 500, 590, or Maverick 88 shotgun with the ProMag Adjustable Buttstock Kit. This kit features a 6-position collapsible stock and a 7-round shell carrier, crafted from high-strength carbon fiber filled polymer for durability. Designed for ambidextrous use, it includes interchangeable recoil pad inserts for added comfort. The left-side-mounted shell carrier offers individual retention adjustment, while the integrated pistol grip provides built-in storage. With QD sling swivel hardpoints, this USA-made buttstock kit ensures adaptability and reliable performance.