I have no stats on that, but I don't have any stats on how many revolvers have malfunctioned either. I assume that would best be obtained by test results obtained from mfgrs. But what mfgr. is going to tell you how often their guns malfunction? Instead, we have to rely on personal experience, the reporting of which is anecdotal and gets heavily weighted by a person's preference (i.e. the person who buys a lemon car, then determines that all examples of that model must be lemons). We can also rely on what is chosen to be carried by our military and law enforcement. We have to hope that the choice had some basis in reality (lord knows they don't always do that). The number of revolvers versus the number of pistols in the US is almost split equally. If a pistol were that inferior to a revolver, one would think that after 130 years, people might have caught on to the problem and either fixed it, or made the pistol "go away". But yes, Murphy can be a bastard, and a malfunction of either type at any time can be disastrous.