For MP7 AEP owners, here is a Li-Po Adapter they can use so they can power their AEPs with Lipo batteries. Softair Zone tells more... "This practical adapter eliminates the need for mods or soldering to equip the Well or Umarex MP7 models with Li-Pos. The ROF and the power becomes more constant and the Li-PO lasts a long time. Especially since you can choose the performance here in the accessories. We think this is a MUST-HAVE for all AEG Mp7 owners."