St George notices / knows guns

St. George leaned back and lowered his voice. “Have you noticed their guns?”
Barry nodded. “All the shotguns? Yeah.”
“Not just shotguns. I’m no expert, but I think they’re all the same model. I think all the people with pistols have the same make and holster, too.”
“So, about twenty, twenty-five matching weapons. Sounds like an armory to me.”

Excerpt From Ex-Isle, pg 424
Peter Clines
https://books.apple.com/us/book/ex-isle/id989619017