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

Published on November 17, 2010
Duration: 2:56

This guide details the process of installing a magazine extension on Remington 870, 1100 Special Field, and 1187 shotguns, as demonstrated by Wes Doss, Brownells Training Group Leader. It covers crucial steps like addressing internal magazine tube crimps using specialized tools and ensuring proper spring length for reliable feeding. The instruction emphasizes safety throughout the modification process.

Quick Summary

Learn to install a magazine extension on Remington 870, 1100 Special Field, and 1187 shotguns. This expert guide, led by Brownells Training Group Leader Wes Doss, covers addressing internal magazine tube crimps using the Brownells Dent Raiser tool and proper spring trimming for reliable feeding.

Chapters

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

Frequently Asked Questions

What is the purpose of the Brownells Magazine Tube Dent Raiser tool?

The Brownells Magazine Tube Dent Raiser is a dual-purpose tool designed to fix dents in the magazine tube and remove internal crimps that can prevent shells from feeding smoothly into a magazine extension on shotguns like the Remington 870, 1100, and 1187.

How long should a magazine extension spring be for a Remington 1100 or 870?

When installing a magazine extension, the new spring should be trimmed to be approximately 12 to 14 inches longer than the total combined length of the installed magazine tube itself. This ensures proper tension and feeding.

What are internal crimps in a shotgun magazine tube and how are they fixed?

Internal crimps are factory constrictions inside the magazine tube that can hinder shell feeding. They are best addressed using a specialized tool like the Brownells Magazine Tube Dent Raiser, which flattens them without damaging the tube, unlike filing.

What safety precautions are necessary before installing a magazine extension?

Before starting any work, it is critical to ensure the firearm is completely unloaded. This includes verifying that both the chamber and the magazine tube are clear of any ammunition. Always double-check the firearm's status.

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