I did it too. But I put them back about an inch or so, and on both ends. I would fire, then load a dart in the front of the barrel, then flip it around in the coupler. It works pretty decently, since in my current project speed loaders aren't an option right now.
Edit: A quick commentary: Is your name supposed to be Fire? Or was Fier intentional?
My name was supposed to be Fier intentionally because my last name is Fierstein. It's sort of a play on words.
![:P](http://nerfhaven.com/forums/public/style_emoticons/default/tongue.gif)