In the beginning (or before A9, says the wiki - before my time anyway) there was the R-4. It was nerfed, buffed, rebalanced - and eventually replaced with the better artwork and stats of the charge rifle we all know and love.
Rather than go back to the old versions and try to use those stats or some combination of them, I've simply reconstituted it as an early model of a charge rifle; half as expensive in materials, 2 shot burst, somewhat less accuracy and damage.
