>>64173399
Something like a P17 Enfield would be the last rifle I'd expect to see in a ghetto shootout.
That being said, it does make sense after a bit of pondering.

Milsurp bolt guns were cheap, and common rifles, the kind of shit gang bangers would get their hands on via their usual methods.
Stolen in burglaries, "borrowed" from dad's closet, straw purchased by someone's girlfriend clearing out the discount rack in the pawn shop, etc.