Yes, if your keg has a pull ring you can vent pressure that way or use a small blunt object to press in the gas poppet. You will need a wrench or socket to pull the beer fitting. I think most of them are around 13/16" or 7/8". Some are 6 point others are 12.
Walmart is about the only reason for open or concealed carry that I can get behind. -Randar