Lyman 1082232 Plus 3 Magazine Extension Fits Remington 870 Black Aluminum

The Lyman Plus 3 Magazine Extension is a straightforward capacity upgrade for your Remington 870 shotgun. Built from 6061 aluminum with a durable matte black anodized finish, this extension adds three rounds to your factory magazine tube—a practical gain for hunters, sport shooters, and home-defense users who want more shells on tap without swapping guns. The modular design and reversible tube give you flexibility in how you set it up, and the included high-visibility follower makes loading and chamber checks easier in the field.

What sets this extension apart is the attention to function. The supplied magazine spring can be trimmed to dial in the fit and feeding behavior to your specific shotgun and ammunition—a detail that matters when reliability counts. The recessed design accommodates a magazine/barrel clamp (sold separately), and at 7 3/4 inches added length, the extension strikes a balance between capacity and handling.

Whether you're running clay courses, hunting waterfowl, or simply prefer a deeper magazine for your 870, this is a no-frills, well-engineered way to get more rounds in the gun. Aluminum keeps it light, the black finish matches most setups, and the design respects the proven simplicity of the 870 platform.

Key Features

• Adds 3 rounds to Remington 870 magazine capacity (using 2 3/4" shells)
• Machined 6061 aluminum with matte black anodized finish
• Reversible modular tube design for setup flexibility
• Recessed for optional magazine/barrel clamp installation
• Includes adjustable magazine spring (can be trimmed for fine-tuning)
• High-visibility follower for easier loading and checking
• Lightweight and durable construction

Specifications

Frequently Asked Questions

Does this fit all Remington 870 models?

This extension is designed for the Remington 870. Always verify your specific model before purchase, and test fit with your firearm.

What's included in the box?

The extension comes with a magazine spring (which you can trim to fit your gun and ammunition) and a high-visibility follower. The magazine/barrel clamp shown in some setups is sold separately.

How much longer will my shotgun be with this extension?

The tube adds 7 3/4 inches to the end of your factory magazine, resulting in a moderately longer fore-end reach but manageable handling for most shooters.

Can I adjust how the extension functions?

Yes. The supplied magazine spring can be cut to your desired length, allowing you to fine-tune feeding and fit for your specific shotgun and ammunition combination.