my friend has one, full auto.
it had the selector switch break.
it was replaced and was good for awhile.
it started not going full auto on him, he gave it another couple of shots, and the whole back of the receiver failed and fell off onto the ground.
the weld job looks nasty, but it's working again.
it's an entry level machine gun, and lots of fun when it works.
even though it's cheap, the value keeps going up.