The FAB Defense PR-MO Picatinny Rail System (FAB Defense part no. FXPRMO) gives 12-gauge Mossberg 500, 590, Shockwave, and Maverick 88 shotguns a real accessory mounting solution without welding or gunsmithing, built by FAB Defense. Molded from reinforced polymer in a black finish, the 7.91-inch forend adds three Picatinny rail sections for lights, lasers, and foregrips. Maverick 88 owners will need to separately source a Mossberg 500 7-3/4-inch action slide to run it, and it is not built for mag-fed or 14-inch-barrel versions of these shotguns. For anyone who has outgrown the bare pump on their home-defense or duty shotgun, this is a straightforward way to add real estate.

Key Specifications

• Material: molded reinforced polymer construction.
• Finish: black finish.
• Rail count: adds three Picatinny rail sections for mounting lights, lasers, and grips.
• Length: 7.91-inch overall forend length.
• Compatibility: fits 12-gauge Mossberg 500, 590, Shockwave, and Maverick 88 shotguns.
• Fitment note: Maverick 88 installation requires a separately purchased Mossberg 500 7-3/4-inch action slide.
• Exclusion: not compatible with mag-fed or 14-inch-barrel versions of these shotguns.

Frequently Asked Questions

Will this fit my Maverick 88? Yes, but Maverick 88 installation requires separately purchasing a Mossberg 500 7-3/4-inch action slide.

Does this fit the mag-fed or 14-inch barrel versions? No, this rail system is not built for mag-fed or 14-inch-barrel versions of these shotguns.

How many rail sections does it add? It adds three Picatinny rail sections for lights, lasers, and foregrips.

Buy the FAB Defense PR-MO Picatinny Rail System

Turn a bare pump gun into a light-and-laser-ready platform, from our gun parts selection. Order it from our Lubbock, Texas gun shop for fast, direct shipping to your door.