M4
The M4 is a modular assault rifle based on the AR-15.
Fires 5.56 NATO rounds, and uses STANAG magazines.

Two models:
M4, shoots in 3-round bursts and semi-automatic
M4A1, shoots in fully automatic and semi-automatic

Shares 80% of parts with the M16.

An offshoot of the weapon is the M416, which uses a different firing mechanism.
Squeaker: The M4A1 was used by every American guy in MW2, it must be a real gun.
(Searches on Wikipedia)
Squeaker: OMG, it is! AND IT LOOKS LIKE THE M16 OMG OMG OMG OMG
by Lord of the Chings February 17, 2014
M4
New kids at the school, first years, naive young student that U4s and above may laugh at and bully for their entire first year before they are accepted into the college.

Bottom of the school heirachy, annoying M4s should be bullied in boys case and bitched about in girls houses, until they are properly behaved.

Sucking up to/ making friends with M4s is forbidden in their first weeks at school.
Wow the M4s this year are arrogant, as always.
by EpsomBanter August 29, 2010
m4
achieves over 75% commenality with M16A2... but shorter range
by Dean August 04, 2003
m4
One of the worst guns ever used.
Dude1:Look at my m4 it rocks!
Dude2:my ak is better.
Dude1: no its not : <--- sad cause he knows its true.
by The Dude92 May 12, 2009
m4
Short barreled butt hole blasting machine. Fires the extremely deadly 5.56mm round. Kills motherfuckers dead
"we drove by and hit his ass with the twin m4's, dropped 4 mags into his house and the bitch just strait blew the fuck up, it was crazy shit"
by matt June 20, 2003
M-4
Lighter virtion of the m-16
big shit
by prat October 02, 2003
M4
Members:
Sandrine Tien
Yvonne Ho
Pauline Do
Tiffinie Pham
M4 is awesome.
by Alan Setthaboupha May 04, 2004

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