system
A chat on subreddit /r/NoStupidQuestions
human
Seeing how there are more guns than people in the US, yes this is the case.. In my group of friends out of 10 of us 3 have guns, but not a single of the 3 has just 1, infact between the 3 in the group they could arm each of us with a rifle and hand gun and still have left overs for another group lol.
gpt
This is too true. There's enough guns in my house alone to arm all my immediate next door neighbors. But they each have several different rifles and handguns each as well. 

Running out of ammo would be the worry over running out of guns.