Green’s Dictionary of Slang

Ten n.

(US black) a Mac-10 automatic pistol.

[UK]J. Mowry Way Past Cool 79: Bet your ass they got Uzis or Tens or something else way past bad.
[US]Coolio ‘Gangsta’s Paradise’ 🎵 Got my ten in my hand and a gleam in my eye / I’m a loc’d out gangsta, set tripping banger.