Effective January 22, 2012, the Postal Service™ will revise Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM®) 601.12.1.1a to clarify that antique firearms that meet the definition of a handgun according to USPS® standards are also subject to the mailing requirements in DMM 601.12.2 through 12.7.
Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM)
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600 Basic Standards for All Mailing Services
601 Mailability
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12.0 Other Restricted and Nonmailable Matter
12.1 Firearms
12.1.1 Definitions
The terms used in this standard are defined as follows:
[Revise 12.1a as follows:]
a. Firearm means any device, including a starter gun, which will, or is designed to, or may readily be converted to, expel a projectile by the action of an explosive; the frame or receiver of any such weapon; any firearm muffler or firearm silencer; or any destructive device; but the term shall not include antique firearms (except antique firearms described under 12.1.1 c and d).
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We will incorporate these revisions into the next monthly update of the online DMM, which is available via Postal Explorer® at http://pe.usps.com.
— Product Classification,
Pricing, 12-29-11