How to Tighten the Barrel & Make a New Magazine Plug for Winchester Model 12 | MidwayUSA Gunsmithing

Published on November 8, 2013
Duration: 5:46

This guide provides expert instruction from Larry Potterfield on how to address a common issue with the Winchester Model 12: a loose barrel assembly. It details the process of tightening the barrel using the integrated adjusting sleeve and how to fabricate and install a magazine plug to comply with hunting regulations. The instructions are clear and demonstrate proficient use of gunsmithing tools.

Quick Summary

Expert gunsmith Larry Potterfield explains how to tighten a loose barrel on a Winchester Model 12 by adjusting the sleeve at the breech end. He also demonstrates fabricating and installing a magazine plug from a wooden dowel, essential for complying with hunting regulations that limit shotgun capacity to three rounds.

Chapters

  1. 00:00Introduction to Winchester Model 12
  2. 01:14Identifying a Loose Barrel
  3. 02:06Tightening the Barrel Assembly
  4. 03:13Magazine Plug Requirements
  5. 03:58Fabricating and Installing a Plug

Frequently Asked Questions

How do you tighten a loose barrel on a Winchester Model 12?

To tighten a loose barrel on a Winchester Model 12, remove the lock screw and disengage the lock teeth on the adjusting sleeve at the breech end of the barrel. Then, turn the sleeve counter-clockwise a few teeth to restore a firm fit between the barrel and receiver.

Why is a magazine plug needed for a Winchester Model 12?

A magazine plug is necessary for the Winchester Model 12 to comply with hunting regulations that limit shotgun capacity, typically to three rounds (two in the magazine, one in the chamber). Without a plug, the Model 12 can hold more rounds than legally allowed for hunting.

How can I make a magazine plug for my Winchester Model 12?

You can make a magazine plug from a wooden dowel. Measure the dowel against the magazine tube to ensure it will block the third shell. After removing the original plug and lock pin, insert the dowel inside the magazine spring before reassembly.

What were the original calibers for the Winchester Model 12?

The Winchester Model 12 was initially offered in 20 gauge, and later expanded to include 12 gauge, 16 gauge, and 28 gauge. It was Winchester's first hammerless pump-action shotgun.

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