According to some sources, the latter was intended to avoid kicking too much dust in front of the gun, hindering the aiming; however it turned out to be a safety problem when firing canister ammunition and consequently the M3A1 went into combat without muzzle brake.
According to some sources, the latter was intended to avoid kicking too much dust under dry ground conditions. However it turned out to be a safety problem when firing canister ammunition and consequently the M3A1 went into combat without muzzle brake.