ANSI/ASB Best Practice Recommendation 060

Guidelines for Barrel and Overall Length Measurements of Firearms

First Edition, 2021
Best Practice Recommendation
Consensus Body: Firearms and Toolmarks

This document provides guidelines for measuring and reporting barrel length and overall length (BL-OL) of firearms, including guidelines for measurement traceability and estimating uncertainty of BL-OL measurements. This document does not apply to descriptive measurements of firearms.

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