Lyman 1082234 Plus 5 Magazine Extension Fits Remington 870 Black Aluminum

The Lyman 1082234 Plus 5 Magazine Extension is a drop-in capacity upgrade for your Remington 870 shotgun, machined from 6061 aluminum and finished in matte black. Whether you're running your 870 for hunting, tactical training, or sport shooting, this extension adds five rounds to your standard magazine without the weight penalty of steel—keeping your gun balanced and handling fast when it matters. The modular design and included high-visibility follower make it a practical choice for anyone looking to extend their shotgun's on-board ammo supply.

Built for reliability in the field, the extension features a recess machined for a magazine/barrel clamp (clamp sold separately) and comes with an adjustable magazine spring that you can trim to dial in the perfect fit and function with your specific gun and ammunition. The high-visibility follower isn't just about seeing rounds at the loading port—it helps ensure smooth feeding and reliable cycling, which matters when you need your shotgun to work without a hiccup.

If you shoot an 870 regularly, you know magazine capacity can make a real difference in hunting scenarios or when you're running courses at the range. This extension gives you more time on target and fewer reloads, all without significant weight or bulk. The matte black anodized finish blends seamlessly with modern 870 setups and stands up to field use.

Key Features

• +5 round capacity increase over factory standard magazine
• Machined from lightweight 6061 aluminum
• Matte black anodized finish
• High-visibility follower for easy round tracking and improved feeding
• Modular design with recess for magazine/barrel clamp attachment
• Adjustable magazine spring included—trim to length for custom fit and function

Specifications

Frequently Asked Questions

Will this extension fit my Remington 870?

Yes. The Lyman 1082234 is designed specifically for the Remington 870 shotgun.

What's included in the box?

The extension comes with a magazine spring (which you can cut to your preferred length) and a high-visibility follower. It does not include a magazine/barrel clamp, which is sold separately if needed.

Can I adjust the fit of the extension to my gun?

Yes. The included magazine spring can be trimmed to length, allowing you to fine-tune the fit and feeding function to work best with your individual shotgun and ammunition.

How many extra rounds does this add?

This extension adds 5 rounds to your standard factory magazine capacity when using 2.75" shells.