Bolt sleeve

[kokomo]

I have a blued bolt sleeve marked with an S. It is a earlier 1903 type not the O3A3. Why is it marked with the S? Thanks

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[John Beard]

I have a blued bolt sleeve marked with an S. It is a earlier 1903 type not the O3A3. Why is it marked with the S? Thanks

The bolt sleeve is marked with an "S" to identify its maker.

Hope this helps.

J.B.