The 4.6mm cartridge was developed by HK for the MP7 and its companion sidearm, the UCP pistol. The UCP never got past the prototype stage, but the 4.6x30mm has definitely made its mark in the MP7.

Looking almost like an oversized pistol, the Heckler & Koch MP7 is a cross between a submachine gun and a carbine that serves around the world in the hands of law enforcement and special operations ...

The MP7 personal defense weapon (PDW) seems to embody the small and fast paradigm. Devised by Heckler & Koch Inc., (www.hecklerkoch-usa.com), it fires a 4.6 30-mm round (equivalent to .18 caliber ...

How the Vector Can Replace the MP7 Just as the RAM-7 shook up the AR class by adding in an option that is superior to the M4A1 at close range, the Vector should be used to shake up the SMG class ...

However, we’ve got you covered with the best MP7 loadout to use if you want to dominate your XDefiant lobbies. The MP7 Submachine Gun has an extremely high rate of fire and great mobility.