The Glock 26, more commonly known as the "Baby Glock" Is the highest-selling subcompact pistol outside of the Glock 43x.

The G26 Gen 5 is almost 1" shorter than the 43x but has a longer barrel. The two-tenth of an inch difference helps improve speed, accuracy, and range all in a small package. 

This is the FS model which includes front serrations, which is help manipulate the firearm with it being so small.