har1690 Posted July 30, 2023 Report Share Posted July 30, 2023 Just wondering what type of finish is typically used on the M60 trunnion/receiver channels? Basic parkerization? Quote Link to comment Share on other sites More sharing options...
mattnh Posted July 30, 2023 Report Share Posted July 30, 2023 The most common types of Park are: Manganese and Zinc. Most of what you see is Manganese Quote Link to comment Share on other sites More sharing options...
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