The Lyman Plus 3 Magazine Extension Fits Mossberg 590 Black Aluminum is a purpose-built upgrade that increases the capacity of your Mossberg 590 shotgun by three rounds. Constructed from durable aluminum with a sleek black finish, this extension is designed to integrate smoothly with the factory magazine tube for a clean, functional look.

This extension is tailored specifically for 12 gauge Mossberg 590 models, giving shooters extra capacity for extended range sessions, training, or defensive setups while maintaining a balanced feel up front. Its robust construction is built to handle regular use, making it a practical enhancement for owners who want more time between reloads. Backed by Lyman’s long-standing reputation for dependable firearm accessories, this magazine extension offers a straightforward way to get more from your shotgun.

• Manufacturer: Lyman
• Model: Plus 3
• Caliber: 12 Gauge
• Capacity: +3 rounds
• Material: Aluminum
• Compatible Firearm: Mossberg 590