You guys have read about how the strangers rifle is where the 347 vesta dynasty comes from haven't you? Apparently the wepaon was supposed to be featured in the HOW but was left out for whatever reason and kept on the back burner until the taken king drops. It's supposedly upgradeable using the new materials found on the dreadnaught along with some other undisclosed materials and a rare drop from round 3 of the new "public event"