This is my name over at THR, which I found through Calguns (or is it the other way around....?). Anyway, I hadn't encountered a lot of other gun-shooting, liberty leaning Jews. Since "Bubba" is the stereotype plastered on gun lovers, and since I am no Bubba (would Bubba eat gefilte fish with horseradish? I ask you.), it just seemed right.
I've seen some great screen names, but my favorite is still "Grisly Atoms". Man, I wish I'd thought that up! About three puns and a vivid image, all in one neat package. A punner is fortunate to get two or three that good in a lifetime (it's like a flawless diamond).