Lyman 1082239 Plus 5 Magazine Extension Mossberg 590 Black Aluminum

The Lyman 1082239 Plus 5 Magazine Extension transforms the Mossberg 590 shotgun's capacity from standard 4+1 to 9+1 rounds without compromising reliability. This black anodized aluminum extension integrates seamlessly with the factory magazine tube while maintaining the shotgun's balance and handling characteristics.

What Makes This Different

Unlike polymer alternatives that can crack under stress, this aluminum construction withstands repeated cycling and harsh conditions. The precision-machined threads ensure proper alignment with the Mossberg 590's magazine tube, eliminating wobble or binding issues common with aftermarket extensions. The extension adds exactly 5 rounds of capacity while maintaining the same diameter as the original tube for consistent aesthetics.

Key Features

• Increases capacity from 4+1 to 9+1 rounds (2¾" shells)
• Black anodized aluminum construction resists corrosion and wear
• Precision-machined threads for secure, wobble-free installation
• Maintains original magazine tube diameter for seamless appearance
• Compatible with factory Mossberg 590 magazine spring and follower
• No permanent modifications required to shotgun
• Includes installation hardware and detailed instructions

This extension performs reliably across various shell types and lengths, from standard target loads to high-velocity defensive ammunition. Law enforcement agencies appreciate the increased capacity for patrol vehicles, while competitive shooters benefit from fewer reloads during practical shooting events. The aluminum construction maintains consistent performance in temperature extremes, from sub-zero conditions to desert heat.

Technical Specs

• Material: Black anodized aluminum
• Capacity: Adds 5 rounds (2¾" shells)
• Compatibility: Mossberg 590 shotguns only
• Thread pitch: Matches factory Mossberg specifications
• Length: Extends magazine tube approximately 5 inches
• Weight: 4.2 ounces
• Finish: Type III hard anodizing
• Installation: Threaded attachment, no gunsmithing required

The Lyman Plus 5 extension represents proven engineering specifically designed for the Mossberg 590 platform. Professional users and serious shooters choose this extension for its reliability and precise manufacturing tolerances that ensure consistent feeding and function.