Such an odd image. I am not sure if the commanding officer is messing with these guys or if this is legitimate training. The soldier on the far left is looking straight up at the sky. They are wielding these like pistols but the mag wells are empty and the magazines are in their pockets. Possibly a safety precaution for the photographer?
I like that they are using Sterling Mk4s, made famous by George Lucas’ Stormtroopers.