FAB Defense FXPR870 PR-870 Polymer Rail System 7.30" Black with Picatinny Rails for Remington 870

If you run a Remington 870 and want to modernize your shotgun with rail-mounted optics and accessories, the FAB Defense FXPR870 PR-870 Polymer Rail System is a straightforward way to add Picatinny real estate to your forend. This 7.30-inch reinforced polymer rail system replaces your factory forend and gives you three mounting points—top, bottom, and side—for red dots, lights, lasers, or grips. It's made from durable polymer engineered to handle the recoil and use you'll throw at a duty or hunting shotgun without adding unnecessary weight or complexity.

The PR-870 is built around the Remington 870's proven platform. The reinforced polymer construction keeps things tough while staying light, and the Picatinny rails follow the standard that works with virtually every modern optic and accessory ecosystem. Whether you're setting up for home defense, tactical training, or hunting, the modular rail design lets you configure your shotgun exactly how you need it without permanent modifications to your receiver.

Installation is straightforward—this is a drop-in forend replacement that doesn't require gunsmithing. If you're looking to add versatility to an 870 without breaking the bank or committing to permanent changes, this gives you the platform to do it.

Key Features

• Three Picatinny rails (top, bottom, and side) for optics and accessory mounting
• 7.30-inch length sized for the Remington 870
• Reinforced polymer construction for durability and light weight
• Drop-in forend replacement—no permanent modifications needed
• Compatible with standard Picatinny-mounted accessories and optics

Specifications

Frequently Asked Questions

Will this rail system fit my Remington 870?

Yes, the PR-870 is designed specifically as a forend replacement for Remington 870 shotguns. It's a direct fit without modification to the receiver.

What can I mount on the Picatinny rails?

Any accessory or optic with standard Picatinny mounts will work—red dot sights, magnified optics, tactical lights, lasers, vertical grips, and rail-mounted bipods are all compatible.

Is this a permanent modification to my shotgun?

No. The PR-870 is a forend replacement, not a permanent receiver mod. You can swap it out and return to the original forend if you choose.

What's included with the rail system?

The product includes the rail system itself; you may want to source any rails, mounts, or accessories separately based on your setup.