Leventhal just ran his mouth saying the shooter had an “M4-style assault rifle” and a “10 mm [sic] Glock handgun.”
10 mm? Glock 20? What’s that even used for?
They do make 10mm Glocks. 10mm is the predecessor round to .40 Smith and Wesson. FYI, the classic .45 ACP caliber is 11.45mm. As for what it it used for - same thing most other handguns are used for, defense.
According to Matt Brackeh, it’s a federal caliber. I dunno if he made that up, but it sounded good in his book! If, in fact, he DID have a federal-caliber Glock, there’s a lot more ‘splainin’ to do.