I know Airbus folks looked at the C-17 cargo handling systems and considered a similar system on the A400M. But I understand (but cannot confirm) that they decided this was too expensive and went with 3rd party systems similar to the C-130, which each service had to buy on their own, separate from the aircraft.
A400M CHS/ADS systems are designed in-house, but the
components and
hardware are supplied by 3rd party suppliers, no different to C-17 in that respect. A common system is built in for each aircraft. It is compatible with 463L/HCU-6, Type V, and French BT13.