FN Model D: The Last and Best BAR

Published on August 21, 2020
Duration: 19:44

This guide details the field stripping procedure for the FN Model D, a variant of the Browning Automatic Rifle. It covers accessing the internal components, including the unique gear-driven mechanical rate reducer responsible for controlling the cyclic rate. The FN Model D, designed by Dieudonné Saive, offers a quick-detach barrel and improved bipod compared to earlier BAR models.

Quick Summary

The FN Model D, developed by Dieudonné Saive, is considered the final and best iteration of the Browning Automatic Rifle (BAR). Key features include a quick-detach barrel for rapid replacement and a sophisticated mechanical rate reducer using gears to control cyclic rates between approximately 350 and 600 rounds per minute.

Chapters

  1. 00:00Introduction to the FN Model D
  2. 01:09Licensing and Early Production
  3. 03:58Dieudonné Saive and the Model D
  4. 05:20Quick-Detach Barrel Mechanism
  5. 07:09External Features and Bipod
  6. 07:47Magazine and Fire Control
  7. 09:47Field Stripping and Internal Mechanics
  8. 13:39Mechanical Rate Reduction System
  9. 15:41Post-War Production and Calibers

Frequently Asked Questions

What makes the FN Model D different from earlier BARs?

The FN Model D, also known as the FN-D, features a quick-detach barrel for faster barrel changes and a mechanical rate reducer for controlled fire. These were significant improvements over earlier US military BAR versions.

How does the FN Model D's rate reducer work?

The FN Model D employs a unique gear-driven mechanical rate reducer. This system uses gears and a rocker mechanism within the trigger group to precisely time the sear release, allowing for distinct slow (approx. 350 rpm) and fast (approx. 600 rpm) cyclic rates.

Who designed the FN Model D?

The FN Model D was developed under the leadership of Dieudonné Saive, a prominent firearms designer at Fabrique Nationale (FN) and a protégé of John Browning. Saive also played a key role in the development of the FN FAL rifle.

What calibers was the FN Model D produced in?

The FN Model D was manufactured in several calibers to meet international demand, including .30-06 Springfield, 7mm Mauser, 8mm Mauser, and later versions were chambered in 7.62 NATO, often utilizing FN FAL magazines.

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