Dimensioning Of Mounting Rail For Small Arms

At a glance..

This document establishes standard methods of dimensioning accessory mounting rails for small arms weapon systems. It also establishes uniform accessory mounting rails and requirements that are interchangeable among the different units of the Defense Department.

The details..

'MIL-STD-1913 (AR)' is a military standard that sets forth the guidelines for creating uniform, interchangeable accessory mounting rails across different units of the Department of Defense. The document provides mandatory standards to be followed while preparing drawings, specifications or technical data packages related to these rails. It covers various aspects such as definitions, general and detailed requirements along with applicable documents.

The book defines accessories as items attached to the rail like laser pointers, fire control devices, night vision devices etc., which are essential components in modern-day warfare. The grooved dovetail feature on an accessory mounting rail serves as a platform where these accessories can be mounted easily without any forward or aft movement during recoil.

The book also outlines specific dimensions required for edge break (.002 inch + .010 inch) and fillet radii (.020 inch + .015 inch). Standard dimensioning and tolerancing rules must adhere to MIL-W-13855 specification using ANSI Y14.5M method but with Inch-pound units instead of metric system.

In summary, this book is intended primarily for those involved in designing weapons systems who need guidance on how best to create standardized accessory mounts that will work interchangeably between different defense departments.