Carlsons Magazine Extension — Benelli M4 12 Gauge 5in 7rd

This Carlsons magazine extension is designed for use with the Benelli M4 in 12 Gauge and extends the shotgun’s magazine capacity. The extension is constructed of blued solid steel and installs by replacing the magazine cap with the threaded tube. Included hardware and follower details vary by unit; instructions are provided for installation.

Key Specifications

• The extension provides a capacity of 7.
• Constructed from blued solid steel for durability and a traditional finish.
• Compatible with the Benelli M4 (Make/Model listed).
• The tube length is specified as 5 inches in the product name.
• Includes a spring and a base clamp with swivel stud as shipped.
• May include a high-visibility follower; some extensions require the factory follower and will not include one.
• The finish is listed as blued.
• Listed weight is 0.4188.
• The threaded tube replaces the magazine cap to allow additional rounds in the magazine.

Whether used for competition, duty, or responsible defensive readiness, this Carlsons extension offers a straightforward, durable way to increase magazine capacity for the Benelli M4. Its blued solid-steel construction and included hardware make it a practical upgrade for those who require reliable, no-nonsense magazine extension performance.