Not sure what you are looking for. Whatever works for the 17hmr would work for the Bmag other than maybe a boreguide. FWIW I just ordered some of the Italian gungrease products and tried them for the first time on my Bmag. They really seem to work.
The thing that really impressed me was the grease itself on the locking lugs of the Bmag. Between that and the tactical bolt handle it closes much easier and feels less gritty.
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