Hi, pretty sure you can get the gen4 (wide frame)in black and silver (nickel). But the gen5 (narrow frame) was only available in the black finish. Could be wrong, but I've never seen a silver gen5 for sale or photos of. There seems to be a few variations in both 4 and 5, in the machining etc. My favorite is the 5 with machined ejector slot and bakalite grips.