Need help IDing a magazine

[lotsofshots]

I got these from my mother in law and have no idea what firearm they fit. Her family has never really been gun-friendly, so I’m thinking there is some kind of military connection. Maybe from the Korean War - an uncle served then? There are no caliber markings or really any markings at all, except for that ‘CO’ and the ‘B’ with a circle around it.

I know that’s not much info, but I also know y’all know a lot about a lot. Any ideas what they fit?












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[BTLowry]

.30 carbine?

[zr2chevy22]

This. They fit an M1 Carbine

.30 carbine?

[talleywack97]

Definitely

[MenardCountyBow]

.30 carbine?

That’s what mine look like

[S-3 Ranch]

.30 carbine?

Yep

[Trailerman3]

Yep

[lotsofshots]

Well that was easy! The GS braintrust strikes again!


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[RifleBowPistol]

Old M1 Carbine, 30 carbine mags.

[Froggy]

I'm close by if you are interested in selling them. I have a M1 Carbine.