BTW, to most people, that's just a stylized skull on the grips. Comic book or no, it's a big skull.
Still, the OP asked whether this makes the 1911 "nerdy" and it most certainly does. I know an old guy with a graphic nude picture of Jessica Rabbit carved into the buttstock of a nice trap shotgun. If he asked whether that picture is "classy", I'd have to say "no." If he asked whether it's "risque", or might offend some kids' parents, I'd have to say, "yes." Personally, I think it's funny as hell. But if he asked those things, those would be the honest answers.
Got nothing to do with what I like or don't like.
For those trying to euphemize around the reality that they're 50 and read comic books, dude, give it up. If you like comic books, that's your [strike]problem[/strike] business. Nobody's going to think more of comic books if you call them "sequential art". Same goes for porn, which can be some fine "sequential art" too.
Let's just say that, when ComiCon comes to town, I've learned to stay off the San Diego Trolley. Smell is stifling. That's pretty much the only exposure I've had to comics since I was a kid, other than Kevin Smith movies, which I like.