Demonstration of US and captured weapons by the 8th Army in Korea on July 21st 1951

In order of first appearance while firing:

0:00 M46 Patton with 90mm main gun
0:25 M16 Multiple Gun Motor Carriage with 4 x 0.50 cal Browning M2 machine guns
0:31 M1 Garand semi-automatic rifle
0:34 M2 Carbine select fire rifle
0:38 M3 "Grease Gun" submachine gun
0:41 M1919 Browning machine gun
0:43 SG-43 Goryunov machine gun
0:47 DShK heavy machine gun
1:23 PPSh-41 submachine gun
1:30 PPS submachine gun
1:39 Degtyaryov machine gun

At 0:28 our man with the M2 Carbine seems to have caught some hot brass in his collar...