*The blowback on the M712 CO2 pistol functions the same as it does on the firearm. There is no slide. The only thing that moves is the bolt. The purpose of the bolt's movement is to cock the hammer (because this is a single-action pistol).
There are very few full-auto CO2 BB or pellet pistols. But this one IS! And, it's full metal.
Load it with CO2 and steel BBs, pull back the charging handle on the end of the bolt to cock the hammer and fire at will!
Replica airguns are a speciality of Umarex, and the Legends M712 just might be the paragon of all firearm lookalikes. There were several variations of this pistol (commonly called the "Broomhandle Mauser" because the grip looks like a broom handle), and this is a copy of the Schnellfeuer (German for fast or rapid fire) version of the pistol, which was produced from 1932 to 1936.