CAA MS500 Mossberg 500 / 590 (12 ga) & Remington 870 Polymer Shotgun Pistol Grip

Swap your wooden buttstock for a streamlined CQB pistol grip in under five minutes.  The CAA MS500 is the rail-free version of CAA’s shotgun grip family, perfect when you want a low-profile handle without the bulk of a top-rail saddle.

• One-piece glass-reinforced polymer keeps weight to just 5.1 oz yet shrugs off 12-gauge recoil.

• Fits any Mossberg 500/590 or Remington 870 12-gauge receiver—no gunsmithing; bolt and washer reuse the factory tang screw.

• Palm-swell backstrap and deep finger grooves deliver a rock-solid grasp with gloves or sweaty hands.

• Open top lets you operate the Mossberg tang safety without shifting your grip.

• Molded-in QD cup bosses accept push-button swivels (hardware optional).

• Compatible with aftermarket AR-15 buffer-tube adapters if you later decide to add a collapsible stock.

Whether you’re building a cruiser-ready home-defense gun or trimming ounces from a field shotgun, the MS500 gives you pistol-grip control and Israeli durability at a fraction of aluminum-adapter weight.