 However, in spite of the benefits of the modern carbine, many armies are experiencing a certain backlash against the universal equipping of soldiers with carbines and lighter rifles in general, and are equipping selected soldiers, usually called Designated Marksmen, or DM, with higher-power rifles.Another problem comes from the loss of muzzle velocity caused by the shorter barrel, which when coupled with the typical small, lightweight bullets, causes effectiveness to be diminished; a 5.56mm gets its lethality from its high velocity, and when fired from the 14.5" M4 carbine, its power, penetration, and range are diminished.Thus, there has been a move towards adopting a slightly more powerful round tailored for high performance from both long and short barrels.