Dude, I was just throwing out a popular handgun as an example. Wouldn't be Surly if we didn't get bogged down on weapon type and caliber.
It's a metonym, placeholder, for something common in aggregate. Just like "assault rifles", obviously there's more than just one type. "Russian Armor", well there's 16 primary vehicle platforms with dozens of variants. "Fighter Jets" could mean any of two-dozen fixed-wing types. "Smith & Weston" or "Colt", make many kinds. But people just say "S&W" as shorthand in a casual gun conversation. "12-gauge/sawed-off/Uzi", just terms people use as a stand-in for the broader range of weapons in that sorta category. If we spend our day using terminology down to the model variant of every single object we're discussing, we'd never finish a conversation. You only get specific when money is on the line, until then shorthand is just easier.
You've never heard some weapon type used as kind of a descriptor for a whole host of similar weapons? Though the term may have jumped the shark when I heard and APD officer describe a homeless machete attack in South Austin last year, and assured us it was unrelated to a similar attack prior. And he starts getting into the difference between the two machetes, and somebody had to cut him off like, "How the fuck you know so much about machetes, Doug?"