What does this barrel stamp mean?
I found it on the barrel under the stock.



Does it mean Maganese, Nickel Steel?


OK and another one...




I have to say up front this is my ugly truck gun...the receiver, barrel and bolt are all different numbers, ERA receiver, Winchester barrel and bolt.

Someone cut down the wood, but left the metal and Iron sights intact (thank goodness), but still she out shoots any #4 I have used.

I paid around $90 for it a few years back just weeks before Johnson hardware in Nanaimo closed.

Recently due to the impossibility of finding stocks and hardware to restore it, and the fact the numbers are all miss matched I have decided to clean the old girl up, which is why I have been noticing these marks as I have only had the stock off a few times before for a quick cleaning.

Also does anyone know the metal will take to being cold blued?
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