Those guys are Indian, per Diogenesis' post, so I don't think it's a MAADI. I think it's a variation of the INSAS (INdian Small Arms System), which is an AK-74 variant AFAICT.
Handguards and front sight post are a little different, but that could be a model variation thing.
Yhank You, I believe you are 100% correct, There are so many variants of the AK it's hard to keep up with them, let alone remember them all :-)