I assume that you must be referring to the Lanier ARF version of the Stinger. The plans of the Stinger 120 kit version do show the CG, but perhaps the ARF model does not provide this data. In any case, I have almost finished my Lanier kit version Stinger 120 and as a result, I just checked out the CG. It is 5 1/8 inches aft of the leading edge. The plans give a range of + - 3 1/8 inches (total of 3/4 inches). Hope this helps.