Allow me to play Devil's Advocate. Examine the '03 S&W Catalog pg 18 4" 66 entry - SKU 162706 - 37.0 oz - 24.3 cm OAL - Uncle Mike's Square Conversion
Combats. Now, skip to the '09 S&W Catalog pg 31 4" 620 entry - SKU 164401 - 36.9 oz - 24.1 cm OAL - Hogue squared/open back monogrip. Hmmm, pretty close! Now, what is the difference between the K-frame 66 and L-frame 620? The L-frame has a ...