Check out this Glock-filled video tutorial that will show you how to disassemble and reassemble a Glock 27 pistol. You will detail strip this Glock 27, or any other Glock, since they are all practically the same.
You will learn about some of the parts of the Glock 27, like the magazine stop, a slide stop, and a slide lock. Before you start cleaning or expecting your handgun, make sure it is unloaded, make sure it is clear.
So, if you want to learn how to field strip a Glock 27 firearm, this is perfect. Really. You will learn a lot here about assembly and disassembly of a Glock 27 pistol.