I took it apart and cleaned it. It was very sooty inside but in good condition. Glad most M1icon Carbine ammo is not corrosive!

Here are some detailed photos:



















More to come...

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The back of the firing pin has what appears to be brass on it... ??? Never seen anything like that before, but when the firing pin is in the forward position, the brass is perfectly flush with the back of the bolt body. Some type of repair??