Is that gen 2 MP7?Had my VFC one for 2 or 3 years now. It's still comppletely stock. Nothing has broken or failed despite getting lots of use . Regular maintainance like all my other GBBRs but thats it. I field it in a woodland site and never feel out gunned , range and accuracy are both very good, run mine on .30's same as all my GBBs.
I THink VFC must have upped their game, 'cos my M249 is awesome and the HK 416 I had on the bench recently for a mate, just to check over and set up is also a beast .