Is a 9mm to small of a gun for a CCW? My buddy is really trying to get me to not buy a 9mm for my summer CCW. I have a S&W 40 that I will be carrying in the winter with the use of extra cloths but I need to get a smaller gun for the summer. I was looking at a SKYY 9mm. He absolutely things a 9mm gun is worthless. A gun that you will carry is far better than a gun left at home because its to heavy or big. But as far as caliber goes do you think a 9mm is a bit small to take someone down?