Top Definition
A 5.56mm assault rifle currently in the developmental stages to replace the M4 Carbine and M16-series weapons, and serve along side the XM-29 (formerly known as the Objective Individual Combat Weapon).
The XM8 is being developed by the U.S. military.
by JoeBob September 07, 2003
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×