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Showing results for tags 'black oxide'.
So while assembling M77 magazines we found one that was completely unserviceable, so we did a rust test vs our old standard finished Vepr .308 magazine also unserviceable. So here are the results of three months outside. All of October, November and December these sat outside. I flip the magazines every few days to allow all sides equal exposure. The block is set at a low angle to allow eventual drainage and drying. We started the test by wiping the black nitride magazine with alcohol to remove any oil coating. The bare steel is marked 9-30 the day the test started, I intend to leave these