I think that's an RPD. Other guy has an AK.
Edit: here's an RPD
99% sure that's what it is.
Well that was his M8 standing next to Gustafsson
The "Jon Jones' right leg"
It's not an RPK, as RPK's are magazine fed, and this is belt.
It's not an RPD, as RPD's are in 7.62x39 and the width of the ammo box on this seems too wide for 7.62x39, it's probably in 7.62x54R.
Most likely some variant of the PKM
(I sell guns for a living)