A battle rifle is a service rifle chambered to fire a fully powered cartridge.
M1 Garand
Chauchat-Ribeyrolles 1918
M1 Garand and en-bloc clips
FG-42 with bipod deployed.
An automatic rifle is a type of autoloading rifle that is capable of fully automatic fire. Automatic rifles are generally select-fire weapons capable of firing in semi-automatic and automatic firing modes. Automatic rifles are distinguished from semi-automatic rifles in their ability to fire more than one shot in succession once the trigger is pulled. Most automatic rifles are further subcategorized as battle rifles or assault rifles.
2nd Lt. Val Browning with the Browning Automatic Rifle in France during World War I
Chauchat Automatic Rifle
Lewis
M1918A2 Browning Automatic Rifle