[TXAZ]

We were looking at some recovered rounds from a couple of 9mm Glocks and a P226 Sig. The Glock fired rounds' striations / markings from the barrel were noticeable different than from a Sig. But the Glock fired rounds (to the naked eye) looked pretty much identical with their polygonal rifling.

So assume authorities recover a bullet but don't have the gun. Can forensic experts (maybe some of you?) conclusively identify it from a

A specific Glock / Sig pistol?

Or that it likely was fired from "a Glock"?

Just curious.