How long is the barrel of a M203 when it is fitted with an M4?
A. DESCRIPTION: THE M203C GRENADE LAUNCHER IS THE EXISTING M203
GRENADE LAUNCHER (LIGHTWEIGHT, SINGLE-SHOT, SHOULDER-FIRED WEAPON)
AND THE NEW ADAPTER KIT TO FIT THE M4/M4A1 CARBINE.
(1) CALIBER 40mm
(2) LENGTH OF LAUNCHER 380mm
(3) LENGTH OF BARREL 305mm
(4) WEIGHT (UNLOADED) APPROX 1.36 kg
(5) WEIGHT (LOADED) APPROX 1.63 kg
(6) MAX RANGE 400m
Here ya go Rambo......., btw the launcher is fitted to the M4, not the other way around.
I think it stick out an inch from the muzzle, very close to being an inch anyways.