The Bundeswehr has started tests to assess the procedures needed to transport a Boxer via A400M. As the load ramp is limited to 32 tonnes and the vehicle weighs 35, the mission module is separated and loaded onto a second A400M. Loading the drive module takes around 10 minutes. 
It is lashed into place with 15 chains and the 300 eyelets that are situated around the plane. In some instances, the Bundeswehr found that "some chains cannot be attached as planned because a component of the boxer or simply a bolt is in the way."
Once fully certified the Bundeswehr will be able to transport two Boxers using three A400Ms. However, this means that the equipment will have to be in place at the target location to reassemble them. According to one German officer I have spoken to, this would include...
An aircraft hangar and two ISO containers or an assembled Boxer recovery vehicle with the ability to lift mission modules. It is this complication that has reportedly prevented use of the vehicle in Mali thus far. Source: bundeswehr.de/de/organisatio…
Probably should add here that the ramp is one factor, the max payload of an A400M is 37 tonnes, so in one piece Boxer is pushing that limit, which affects range and austere landings etc. Range with 20t and 30t is 6,000+ km and 4,000+ km respectively.
Tactical, i.e. austere landings on challenging airstrips, which are par for the course in Mali, can only be accomplished with a payload of 30t. Add to this, empty weight is 76.5t, max takeoff weight 137.5t, and normal fuel load is 48.4t.
As those loadings are adjusted by carrying a Boxer in its complete form, the operational range, etc are reduced, as are the landing capabilities. Then comes the load-bearing ability of the ramp.
