Lyman 1082237 Plus 3 Magazine Extension Fits Mossberg 590 Black Aluminum

The Lyman Plus 3 Magazine Extension is a black aluminum tube designed to bolt onto the magazine of your Mossberg 590 shotgun, extending its capacity by three rounds. If you run your 590 for home defense, clay sports, or tactical training, adding tube capacity without swapping guns makes practical sense—you keep the same gun handling and ergonomics while gaining reserve ammunition at the ready.

Built from aluminum, this extension is lightweight and corrosion-resistant, a sensible choice for a shotgun that might see hard use or harsh conditions. The Mossberg 590 platform has proven itself across decades of police, military, and civilian service, and Lyman has engineered this extension to integrate directly into that proven design.

Installation is straightforward: the extension bolts onto your existing magazine tube. No gunsmithing required. Once mounted, it adds three shells to your magazine capacity, which translates to more shooting between reloads and less downtime at the range or in a defensive scenario. For shooters who want to squeeze more from their 590 without buying a second shotgun, this is a practical, cost-effective upgrade.

Key Features

• Black anodized aluminum construction for durability and corrosion resistance
• Adds three rounds of magazine capacity to your Mossberg 590
• Direct-bolt installation onto Mossberg 590 magazine tube
• Maintains original shotgun handling and ergonomics

Specifications

Frequently Asked Questions

Will this magazine extension fit my Mossberg 590?

Yes, the Lyman Plus 3 is engineered specifically for the Mossberg 590 platform and bolts directly onto the shotgun's magazine tube.

How difficult is installation?

Installation is straightforward and involves bolting the extension onto your existing magazine tube. No gunsmithing or special tools are required.

How many extra rounds does this add?

The Lyman Plus 3 extension adds three rounds of magazine capacity to your Mossberg 590.

What material is the extension made from?

The extension is constructed from black anodized aluminum, which provides durability and corrosion resistance for extended use and harsh conditions.