There's a little more to my nick...
I used to play Q2 under my real name, but then I got into my first clan and I wanted a better name.
I posted on the NG that I used to hang out on for suggestions, and a vote was taken. Mr_Railgun came up tops, apparently because I used to be a bitch with it
But then I switched clans, and my nick together with the clan tag was too long for some servers (still boggles me), so I shortened it to Railz.