Britain’s Only Repeating Enfield Trainer: the No7 Mk I

Published on June 12, 2018
Duration: 6:21

This guide details the disassembly and reassembly of the British No. 7 Mk I .22 caliber training rifle, as demonstrated by Ian McCollum of Forgotten Weapons. Key modifications include a unique bolt head with dual extractors and a shortened bolt throw, adapted for the .22 rimfire cartridge. The process highlights the differences from a standard No. 4 Lee-Enfield, particularly in the bolt and magazine feeding mechanisms.

Quick Summary

The British No. 7 Mk I Enfield Trainer is a rare .22 caliber bolt-action rifle, unique for its repeating, magazine-fed action. Developed by BSA after WWII, only 2,500 were made. It features a modified bolt with a shorter throw and dual extractors, and a 5-round magazine adapted from BSA inserts.

Chapters

  1. 00:05Introduction & Rifle Overview
  2. 00:30Unique Repeating Action
  3. 00:58Production History
  4. 01:24Receiver Markings & Modifications
  5. 01:55Bolt & Barrel Modifications
  6. 02:36Magazine Design
  7. 03:27Bolt Head & Extractors
  8. 04:39Firing Pin Assembly
  9. 05:07Sight Configuration
  10. 05:35Conclusion & Collectibility

Frequently Asked Questions

What makes the British No. 7 Mk I Enfield Trainer unique among .22 caliber training rifles?

The British No. 7 Mk I is distinguished by its magazine-fed, repeating bolt-action design. This sets it apart from most other British .22 trainers, which were single-shot, and even the Canadian No. 7 Mk I.

How was the No. 7 Mk I Enfield Trainer adapted for .22 caliber ammunition?

The rifle's receiver was milled out and fitted with a separate ejector. The bolt was substantially modified with a shorter throw and a new bolt head featuring scalloped edges and dual extractors to handle the .22 rimfire cartridge.

What is the capacity of the No. 7 Mk I Enfield Trainer's magazine?

The No. 7 Mk I Enfield Trainer utilizes a removable 5-round box magazine. This magazine is an adaptation that houses a standard BSA .22 caliber rimfire rifle magazine insert within an Enfield magazine shell.

When and by whom was the No. 7 Mk I Enfield Trainer developed?

The No. 7 Mk I was developed by BSA after World War II. Approximately 2,500 units were produced and delivered in 1948, primarily for the Royal Air Force.

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