Small arms ammunition is a military term for ammunition used in weapons systems with bores not larger than 20 millimeters (.787 inch).

Footnotes / Sources:

“Glossary ⇒.” Sporting Arms and Ammunition Manufacturers’ Institute. Ed. SAAMI’s Technical Committee. Web. 15-18 Jan. 2011.

“DOD Dictionary of Military Terms ⇒.” Defense Technical Information Center. Joint Education and Doctrine Division, J-7, Joint Staff, n.d. Web. 7 May 2014.

Questions:

• Did/do you serve in the US Military (remember families serve too)? If yes, all of us at Classic American Gunsmith thank you for your service and our freedoms.
• What small arms weapons systems did you use during your service? We welcome stories from any era.