There's money in guns. Just ask Paul Ryan (sorry, Paul Ryan fans, but he just got burnt). As much as there is a big part of the population that isn't too keen on guns, there's a huge part of the population that loves them. These would be a hit in the gun world. Every girl at the Nascar races would be wearing these. Then it would get to a point where the guns got bigger and bigger. Soon women would have full on AR-15 heels.
This is maybe more of a question for cartoon writers, but if those guns were real and they fired, would she fly up in the air? Please feel free to take your time to do the proper research before you answer me, and also please understand that I won't take "it wouldn't work" as an answer.