What is this headstamp

[matt9052]

I have some brass and I was wondering who made it.
It is stamped: IMG 5.56 03-88

I also have some stamped TZZ

Both are .223/5.56

Matt

 

[Walkalong]

IMI in Israel makes IMI & TZZ

 

[Upriver]

I believe IMG is Guatemalan surplus (Industrias Militares de Guatemala)