Nigeria rapper, Sauce Kid changes name to "Sinzu SMG"...What do you think is the meaning of SMG?

Rapper Saucekid says via twitter  he's giving up his alias 'Saucekid' for a new ganger  'Sinzu SMG'.

"Officially dropped the alias 'Sauce Kid'. #SinzuSMG" He tweeted...

First it was Wizkid and now Saucekid...who is next?