Magazine ID

Chevelle SS said:

I got these four at an auction in a box with some ammo, and I'm not sure what they are. I'm thinking M14/M1A. Note two separate kinds.

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The ones with the lugs welded on the back are definitely M1a.

Chevelle SS said:

Ok, thanks! Half way there.

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Any markings at all on the others? That spring loaded follower bolt stop is really weird, Ive never seen anything like it.

Looks like you nailed it!
I was thinking AR10 early on, but was only seeing the simple AR15 style follower....apparently they realized that spring loaded gimmick was unnecessarily complex and quickly did away with it, lol.

Chevelle SS said:

Ok after several hours of searching google I think they are 1st gen Armalite AR10 mags.

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Holy smokes, you can't make this stuff up, my LGS has 2 of these for sale- complete with the goofy followers!
They are asking $40 a piece.

The M1A/M14 magazines are probably Chinese; US magazines would be marked with the contractor's code.

Jim