Years ago, my wife had a gun that looked like a tube of lipstick. It was a single shot 410 shotgun. I wasn't into guns at the time, so I didn't even look at it closely, but from what I do remember the firing pin was a post on the top. You pulled the top off and jammed it hard on the other side of the tube while (hopefully) pointing it in the other direction. A Georgia state police officer took it away from her when she saw it in the women's rest room at a rest area. After that happened, I did some research on it, and as far as I know, the National Firearms Act (NFA) makes any sort of disguised gun illegal. In other words, if it doesn't look like a gun, then it has to be NFA registered. So, no cellphone 22 for me, and I'm glad the LEO didn't haul my wife in on felony charges for an honest mistake.