It is a parade of islamic thugs.
But they want to look good!
The PK/PKM uses the same cartridge (7.62x54Rmm) as the PSL and SVD rifles. The AK-47 uses the same cartridge (7.62x39mm) as the light machines guns RPD and RPK. Many of the parts can be swapped, and, if necessary, parts can be combined to make mutant AKs.
Particularly if they're the Russian PKP *Pecheneg* Squad automatic weapon version, fairly common with the Russian VDV airborne forces. They don't issue a *spare* barrel with them, as the heavier barrel is not removable.
I always found the *takkies* [nylon tennis or running shoes] and *vellies* [Voeldskeins, roughout work shoes approximately equivalent to American suede *hush puppies* shoes popular with teenagers in the 1960s and '70s] used by the Rhodesian forces through the late 1970s to be damned practical in Rhodesia's southern California-like climate and conditions. Even the Rhodesian RLI paratroops made jumps wearing the things instead of the more usual jump boots.
Except for the British South African Police [BSAP] Police Tracking Units [PATU] and some Internal Affairs [INTAF] reserve units, proud of their polished black boots that set them apart from the other troopies.