Not entirely accurate. The ATF actually specifically requires that semi-auto weapons are not readily convertible to fully automatic by way of a simple parts swa

Not entirely accurate. The ATF actually specifically requires that semi-auto weapons are not readily convertible to fully automatic by way of a simple parts swap. A standard, semi-automatic AR-15 will not accept a full-auto M16 trigger group; the M16 trigger group requires an extra hole to be milled in the receiver which isn't present on semi-auto receivers.