I would bet since the 30S uses the 36 slide and there isn't a 36 Gen4 yet...that is the reason...will they make one???...who knows but they will have to engineer (which may or may not be a simple process) a Gen4 G36 slide to make a Gen4 G30S which would be my top choice...if not, I may just get a G30 Gen 4 as I prefer the larger magazine release and the pattern of the Gen4 frames...plus the 3rd magazine...
****G17**G21 Gen4**G26 Gen4**G30S****
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