Installing a Magazine extension on a 870, 1100 Special Field, or 1187 Shotgun

Published on November 17, 2010
Duration: 2:56

This video demonstrates how to install a magazine extension on Remington 870, 1100 Special Field, and 1187 shotguns. It covers safely removing the magazine spring retainer, addressing internal magazine tube crimps using the Brownells Dent Raiser tool, and final assembly with a function check. Proper spring trimming and securing the extension are highlighted for reliable feeding and increased capacity.

Quick Summary

To install a magazine extension on Remington shotguns, first ensure the firearm is unloaded. Address internal magazine tube crimps using the Brownells Magazine Tube Dent Raiser tool. Trim the new spring to be 12-14 inches longer than the tube and perform a function check with dummy rounds.

Chapters

  1. 00:00Introduction & Safety
  2. 00:21Remove Magazine Spring Retainer
  3. 01:02Address Magazine Tube Crimps
  4. 01:41Using the Dent Raiser Tool
  5. 02:15Final Assembly & Function Check

Frequently Asked Questions

What is the primary challenge when installing a magazine extension on Remington shotguns?

The main challenge is often internal crimps inside the magazine tube that prevent shells from feeding smoothly into the extension. These crimps need to be flattened using a specialized tool like the Brownells Magazine Tube Dent Raiser.

How do you properly trim the magazine spring for an extension?

The new magazine spring should be trimmed so that it is approximately 12 to 14 inches longer than the total length of the installed magazine tube. This ensures proper tension and reliable feeding.

What tool is recommended for fixing magazine tube crimps?

The Brownells Magazine Tube Dent Raiser is specifically recommended. It's a dual-purpose tool designed to flatten dents and remove internal crimps without damaging the magazine tube, requiring a brass hammer for use.

What are the essential safety precautions before starting this modification?

Before starting, it is absolutely critical to ensure the firearm is unloaded. Visually and physically confirm that both the chamber and the magazine tube are clear of any ammunition.

Related News

All News →

More Gunsmithing & DIY Videos You Might Like

More from Brownells, Inc.

View all →