No it's not the H&K MP5K, have a closer look! It has an M4 receiver and takes M4 magazines...

Let me introduce to you the new M4 Tactical Pistol Series from Ares Airsoft wich should be good primaries for CQB games or as backup AEGs for airsoft snipers. The series come with the EFCS or Electronic Firing Control System which is a MOSFET but can be easily be reprogrammed using the EFCS box from Ares Airsoft.