The 620 sports S&W-branded Hogue grips; the 638 has a black Barami hip grip, and a brushed aluminum Tyler-T grip as the "hand filler." The Barami has a flange on the right side so the gun functions as its own holster (assuming a good gun belt), but I hear that Magna grips are similar to the non-flange grip panel of the Baramis, but on both sides.