ATF and BB Guns
Bob Owens has more on the issue. Seems ATF can’t comply with a simple FOIA request. And, like I said, you cannot convert them to machine guns:
An Airsoft expert from England dismissed the claim as absurd. In the U.S., AirSplat expert Jon Dibblee — who was once Sgt. Jon Dibblee, a U.S. Army infantryman — categorically denied that the WE Tech M4s could be made into machine guns, an expert opinion supported by a gunsmith specializing in the AR rifle who examined another WE Tech in great detail.