Not being mean or a jerk but handguns don't have clips, they have magazines. As for the M1 Garand, you are very wrong on the caliber. The Garand fires the 30-06, a rather common round here in America as its one of the preferred hunting calibers.
A true M14 are select fire, meaning they can go from semi-auto to full auto to safe. The civilian version is known as the M1A, a very accurate rifle indeed.
.30 caliber carbine is damn hard to find in most cities. Your best bet for that would be to check mil-surp shops and even then ammo is rare at best. Though the Garand is a fine little shooter, ought-six is gonna be one of the harder rounds to find…
The p90 and G18 are going to be next to impossible to find and neither of them take "clips", they take a magazine. Can you say magazine, can you? The FNP90 uses the 5.7 round and the only good thing about it comes with the illegal to own…
Unless you have a Dragunov or (clone) or a PK semi auto variant or something similar, you not using a semi-auto in the same caliber as your Mosins (7.62x54).
You honestly can't get an answer to this as there aren't any runners to research. I don't mean to be a dick, but seriously nobody can honestly know this.
Forrest this is ZH-223 do yo copy over. I need to relay you this message, watch out for Lord B and his lackeys Azkiel and David Framer dont let them try to pull you towards their side. Keep safe ZH-223 out