Straight from the website of the Cybersecurity and Infrastructure Security Agency:
Guidance on the Essential Critical Infrastructure Workforce
MEMORANDUM ON IDENTIFICATION OF ESSENTIAL CRITICAL INFRASTRUCTURE WORKERS DURING COVID-19 RESPONSE
March 28, 2020
LAW ENFORCEMENT, PUBLIC SAFETY, AND OTHER FIRST RESPONDERS
* Workers supporting the manufacturing of safety equipment and uniforms for law enforcement, public safety personnel, and first responder.
* Workers supporting the operation of firearm or ammunition product manufacturers, retailers, importers, distributors, and shooting ranges.