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m20

engine code for the small 2.5 liter or 2.7 liter (eta) 6 cylinder BMW engine that came in some of their cars during the 80s and early 90s such as the e30 3 series and e28 and e34 5 series.
The 1987 BMW 528e has a M20 2.7 liter eta engine.
by venomrs4 September 10, 2006
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m203

The M203A1 is a 40mm, single shot, breech loaded, pump action, shoulder fired grenade launcher. It is used by both American and Canadian forces. It is mounted under the barrel. It ranges from 100-400m adjustable in 50m increments. The most commonly used rounds are smoke, CS, and HE rounds. It weighs 1.3kg unloaded and 1.8kg loaded depending on the round. It is simple to operate, take apart, and clean.
The M203 Grenadier took out a trench from 350m.
by Brendan September 29, 2004
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m-4a1 m203 assualt rifle

The M4 is light and more durable than the m-16 but is a smaller version.

Caliber: 5.56mm NATO
Action: Gas operated, rotating bolt
Overall length: 838 mm (stock extended); 757 mm (stock fully collapsed)
Barrel length: 370 mm
Weight: 2.52 kg without magazine; 3.0 kg with magazine loaded with 30 rounds
Rate of fire: 700 - 950 rounds per minute
Maximum effective range: 360 m
by Lancer Fox July 30, 2003
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m-4a1 m203 assualt rifle

The M4/M4A1 5.56mm Carbine is a lightweight, gas operated, air cooled, magazine fed, selective rate, shoulder fired weapon with a collapsible stock. A shortened variant of the M16A2 rifle, the M4 provides the individual soldier operating in close quarters the capability to engage targets at extended range with accurate, lethal fire. The M4 Carbine achieves over 80% commonality with the M16A2 Rifle.
The m-4a1 m203 assualt rifle is similar in design and functioning to the M16 family of rifles. Compared to the M16A2 rifle, the M4 Carbine is 1.3 pounds lighter, 6 5/8 inches shorter with buttstock extended, and almost 10 inches shorter with the buttstock collapsed.
by bob909 September 27, 2005
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M203

A singular pump action single fire grenade launcher. Fires 40mm high explosive shells. Little kids know this thing as the noob tube.
IRL: "Private! Cover our men using the M203.
C.o.D: "Aww that idiot noobtubed me!"
by Charles Keif February 10, 2014
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M203

The thing under the barrel of Tony Montana's M16A2 that shoots grenades.
"SAY HELLO TO MY LITTLE FRIEND!!!"
-Tony Montana as he blows open the door with his M16A2 with M203.
by Tony Scarface Montana October 24, 2008
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m-4a1 m203 assualt rifle

M4A1 M203 refers to the M4A1 carbine with M203 grenade launch attachment.
The M4A1 is used in the military as an alternative to the m16
by Anonymous August 2, 2003
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