It also looks like the P1 used by the Bundeswehr. In fact it's the same gun with another name.
Another Relict of WWII i guess, same for the MG3 which is a slightly modified MG42.
As far as i know there has been added some security mechanism to restrict the weapons max. fireing rate. Coz the MG42 was increasing fireing rate by the time it was fireing, which could caused demage to the one who's shooting it, even heartattacks.