G&P have posted pictures of a new metal receiver body for the Maruzen M870 series, that also fit the upcoming masterkey set from G&P. Weight is given as 470g, but no price or release date has been given yet. Thanks go out to
nikoneko for posting the news.
Don’t forget that ANGs have metal barrels available (as previously posted in the news).. so you can now make yourself a full metal masterkey set for a reasonable price.