They may be using lead in their bodies and parts (some portions of the metal makeup may be lead) and the paint / finish as well (remember all those toy recalls from lead?)
Really, unless you ingest it or are soaking your hands in fresh liquid lead based paint, nothing is going to happen to you.
You're probably ingesting more lead from eating sushi like tuna than you would be from handling an AEG.
BTW: in the Arnies thread, it states that Tokyo Marui are under the same restriction (must change manufacturing process or they won't be allowed to export to other countries). It's likely there are more TM AEG's out there than Dboys.