Top Selling Pistols on Guns.com in 2020 The most popular category of firearms produced year over year, the semi-auto pistol also proved king in Guns.com's catalog in 2020, and we crunched the numbers to see who was on top of the trend. Of course, this "Top 10" countdown is just a list of pistols we've sold on Guns.com over the course of this wild year and is not based on industry-wide figures. Further, due to supply chain issues, it should be taken with at least a pinch of salt as some models were harder to keep in stock than others, which could account for several popular makes missing the cut.