For field use, I got a couple of the thumb sized sharpeners from Benchmade (made by Redi-Edge). They are no Sharpmaker certainly, but they work much better than I expected. If the knife starts out shaving sharp, it seems to keep it almost as sharp. I was very surprised at this and wonder what experiences others have had with the Redi-sharps. (They are marketed by a couple of different companies.)
One of the reasons that I like these is that the smaller one fits conveniently inside the "pocket" of the flap of a cordura belt case for a full sized Grip.
One of the reasons that I like these is that the smaller one fits conveniently inside the "pocket" of the flap of a cordura belt case for a full sized Grip.