Many SAWs (such as the RPK and L86) are just assault rifles or battle rifles that have been changed. They may be able to carry more ammunition and will almost always have a bipod. In the case of some assault rifles, such as the H&K G36 or Steyr AUG, the SAW is simply the usual rifle with a few parts changed. However, the Austrian Army, who uses the most Steyr AUGs, doesn't use the HBAR (heavy barrel) version of the assault rifle. Instead, they use the MG 74, which is a gun which was made from the design of the German WW2-machine gun MG 42. One of the first weapons designed for this role was the M1918 Browning Automatic Rifle. Even though it could not carry many bullets in its magazine, it was still better than the usual infantry rifle.