Soldiernurse...they should be the same size but I feel (as do others) that the newer grip pattern makes the grip feel a bit smaller...I would agree that is so between the G21SF and the G21 Gen4...I don't have both of the G30s (G30SF and G30 Gen4) to compare them in person but did have a G21SF and now own the G21 Gen4...
****G17**G21 Gen4**G26 Gen4**G30S****
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