They make tool holders that fit on the handle bars that would be perfect for a snubby or small pistol. My wife uses hers to carry tools for her bike, but it's just the right size. Available online or at a decent bike store.I have found fanny pack holsters are good except if you ride hard I don't like the perspiration condensing on the pistol inside the holster. Same problem carrying in a camelback. Fanny pack modified to eliminate waist straps and Velcro straps to bars/frame not bad but reach is awkward. A frame bag just behind the bars seems like a good solution. Or modify the fanny pack holster for frame mounting to top bar just behind handle bars, my wife sews I think I will try this. Pics later.