From the Maryland AR-15 Shooters Site:
[url]http://groups.msn.com/TheMarylandAR15ShootersSite/ar15faq.msnw[/url]
[b]Q: What Militaries use the M16 as a weapon (either primary rifle or a for Special Operations Troops)?[/b]
[b]A:[/b] Courtesy of Boris Kupershmidt
[i]M16 series rifles are produced in the[/i] US, Canada (C7/C8), Singapore, and China.
[i]Nations using the M-16 include[/i] Australia (SAS), Barbados, Belize, Bolivia, Botswana, Brazil, Brunei, Burma, Cambodia, Cameroon, Chile, Congo, Costa Rica, Denmark, Dominican Republic, Honduras, El Salvador, Nicaragua, Ecuador, Fiji, Gabon, Greece, Grenada, Saudi Arabia, South Korea, Lebanon, Lesotho, Liberia, Malaysia, Mexico, Morocco, Haiti, Ghana, Indonesia, Jamaica, Jordan, Laos, Nigeria, North Korea, Netherlands (Royal Marines), Oman, Panama, Philippines, Qatar, Somalia, Sri Lanka, Thailand, Tunisia, Taiwan, Turkey, the UAE, United Kingdom (SAS), United States, Uruguay and Vietnam.