This is not exclusive to Airguns since trends of Airguns are highly influenced by what type of Real Steel Pistols are popular to people. This is often based on what people see portrayed in movies and TV Series, and also promoted online. There is for sure an overlap in what is popular and it is hard to say what is influencing what? Is it the popularity of Pistols out in the real world that influences what we see being used in the movies and on TV? Or is it what we see in Movies and TV that influences our choices of pistols out in the real world? Perhaps it is a combination of both?
My list is based on my own personal experience and does not represent the entirety of types of Pistol designs available.
In this Update Preview Video I take a look at three CO2 Air Pistols from ASG, Gamo and Barra. All shoot 4.5mm steel BB’s and one can also shoot .177 caliber pellets. two of them have blowback action. Two are also styled after the popular 1911 Semi Auto Pistol. The ASG 1911 has a unique magazine and chambering system that is the first I have seen of this in a Blowback Airgun. It offers with blowback operation along higher fps and a nice light semi auto trigger, which is a combination not offered in many Airguns.