Original sentence: Its muzzle energy and range are beyond those of any submachine gun of the period, but less than those of battle rifles such as the M1 Garand.The classification of the M2 and M3 is also a controversial subject, as they use an intermediate-power cartridge and are selective-fire firearms, but are weaker than a typical assault rifle.What category of firearms the M1 Carbine series fits into has been the subject of much debate