The Sterling MK IV is the final and best iteration of the sten gun. Like the sten gun, the magazine oddly loads from the left side. A handful of prototypes saw use at the end of WWII, and it saw extensive with the british from 1953 thru the first gulf war. It is an open-bolt, magazine fed submachinegun.  The sterling also has a very low rate of fire and a 34 rd magazine that makes it seem to last longer when shooting full auto. Its very controllable and the rate of fire is tuned about perfect for accurate full auto fire.