If it is a full auto israeli the most likely possibilities are:
1) registered FA gun that was stolen
2) legally imported semi auto that was illegally converted
3) illegally imported gun
Is it an open bolt gun?
Is there an import stamp on it?
Does it have a fixed firing pin?
Does it have a folding stock?
is it 9mm or .380?
I really hope that you have a semiauto gun and not a full auto.