This Carlson’s magazine extension (mfr. part no. 04504) adds 10 rounds of capacity to a 12-gauge Remington 870, 1100, 11-87, Versa Max, or V3 shotgun. It’s built for home protection, competition, and law enforcement use.

Key Specifications

• Adds 10 rounds to your shotgun’s magazine capacity.
• Chambered for 12-gauge shells.
• Fits the Remington 870, 1100, 11-87, Versa Max, and V3.
• Constructed of blued solid steel.
• Includes a spring.
• Includes a base clamp with swivel stud (works with a QD sling swivel, sold separately).
• Includes a high-visibility follower.
• Threaded tube design replaces the factory magazine cap.
• Overall length of approximately 15.85 inches.
• Manufactured by Carlsons.

Frequently Asked Questions

How many extra rounds does this extension add?

10 rounds, on top of your Remington 870/1100/11-87/Versa Max/V3 shotgun’s factory capacity.

Is it built from steel or polymer?

Blued solid steel.

Buy the Carlson’s Remington 870 10rd Extension

Shop the Carlsons lineup or browse our full Shotgun Magazines selection to find the right fit for your firearm.