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1.
LMG
Light Machine Gun: A light, man-portable weapon, normally used by dismounted infantry as a force multiplier. Normally belt or box fed, LMGs offer excellent extra firepower to a squad/section of soldiers.

Common LMGs used by Western Nations:

5.56mm M249 SAW - United States Army/Marine Corps
5.56mm L86 Light Support Weapon - Royal Army
5.56mm C9 FN Minimi - Canadian Army
5.56mm F89 - Australian Army
5.56mm Mini-mitrailleuse - French Army
LMG base of fire right here. Hammer that trench.
by Mogzster January 03, 2006
 
2.
LMG
Short for "Let me guess"
LMG, you're quite tired
by Stuggi February 20, 2005
 
3.
lmg
Lick My Grundle

-Used when an absurd request is made
When Osh asked me to drive him home, I told him to lmg...he lived 20 minutes out of the way.
by Playswithsquirrels May 30, 2007
 
4.
LMG
Light Machine Gun, the most basic primary weapon in the Half-Life mod, Natural Selection. It is fast firing, accurate, and has a large (50 bullet) clip.

It is not extremely damaging; just 10 hp against an un-carapaced alien with an un-upgrated gun, but this is offset with the rate of fire and clip. Just make sure to point it in the general direction of the target.
Every marine begins with an LMG, and may be given an HMG, Shotgun, or Grenade Launcher.
by Kenthar November 15, 2003
 
5.
LMG
Light Machine Gun, the most basic primary weapon in the Half-Life mod, Natural Selection. It is fast firing, accurate, and has a large (50 bullet clip).

It is not extremely damaging; just 10 hp against an un-carapaced alien with an un-upgrated gun, but this is offset with the rate of fire and clip. Just make sure to point it in the general direction of the target.
Every marine begins with an LMG, and may be given an HMG, Shotgun, or Grenade Launcher.
by Kenthar November 15, 2003