You don't actually have two guns though, you have a .45 thats been hackneyed into being a 10mm, using the wrong breechface. Yeah it works, but its nasty. You have one
gun that dresses in drag on the weekends and can mostly pretend to be 10mm is what you have at the end.
Don't mind me though, I irrationally hate conversion barrels. Like with a blood red, deep seated hate. Like 1877 Kars for Kids, or the paul mc cartney christmas song.
Like If I bought a used pistol with a conversion barrel I would offer the barrel to my friends first for free. I would literally give it away. Or donate it to a gun instructor or something. If nobody wanted it I would actually throw it straight into the trash. I just think that stuff is garbage. Glocks are cheap enough that theres very little reason to not buy an extra gun. (you can buy like two large frame glocks for a little more than the cost of a decent 1911, as an example) And if you can afford 10mm you can easily afford an extra gun. On the used market you could probably get two large frames for right around a grand or less. Depending on the generation you want. Also theres a value prop problem. If I buy a G20 and a G21 at tthe end....
I actually have two guns. If I was stupid and needed money I
can sell one of them as a complete gun. I cannot do that if I flinted out and bought a conversion barrel.
A conversion barrel gets me none of that win, and a loss in the form of a conversion barrel that basically very few people want. Dead weight dust collector.
Also every time I see someone with one of these shitty conversion barrels (although its usually the 40 to 9 thing) theyre always running the caliber they converted to, like they made a mistake in buying the original gun or something. It's cheaper to just buy the gun you really wanted to begin with.
"Two is one and one is none" or something like that