Damn, are people that ignorant of FA weapons?
There are quite a few different ways to convert a Glock to fire full-auto.
Redneck2, you show your ignorance when you state that is impossible for a Glock to be impossible. Then again you show it when you say it would be "extremely difficult" to control. Full-auto glocks are easy to control with a LITTLE practice. They are easy to use if you take the time to train. Who is the one perpetuating myths now? If you haven't fired a Glock in full-auto, shut your trap about how "difficult" it is to control.
As for a Glock 18, they come from the factory with a selector switch on the slide. You can also buy drop in kits to make them full-auto for a few hundred bucks if you are a PD or military buyer.
Some of the conversions have the selector on the back of the slide, while others have them on the side. And you aren't just limited to Glock 17 conversions to an 18... you can convert ANY glock pistol to fire full-auto with the conversion pieces. I have personally fired a Glock 17, 19, 20, 21, 22, 26, and 34 converted to full-auto. The 20, 21, and 22 are much more difficult to master, but it could be done. The 9mm's were pretty controllable with a little practice.
If I could, I would carry a FA Glock 19 as my carry piece. I can easily get 3-5 round bursts with a single trigger pull (did it in the first two mags of practice), and I have the option of using it semi too.
Anyways, please please please don't spout crap when you obviously don't know what you're talking about.
Oh, and the Glock 18 holds up to full-auto fire just fine.
And it isn't a Hammer on that Glock, that is the selector switch.
Semper Fidelis!