I'm somewhat confused as to what exactly you are trying to say with this poster. If you are for gun control, the made up statistic invalidates your argument. But if you're parodying gun control arguments, the imagery isn't ludicrous enough to make it satirical.
I saw several gang-bangers walk into a gun store in Tucson - it was hilarious. By the time they made it to the counter there were about 12 people (at least 4 of whom were match-grade experts) with lines of fire on them. Not one unholstered a weapon, not one even looked aggressive.
But the gang-bangers looked around and saw a LOT of smiling people looking at them, every one of which had a pistol of one sort or another strapped on.
They turned around and left. We were all kinda disappointed.
When everyone is armed, everyone is safer. Anyone goes nuts and they'll be blown away before they can do anything more than get one shot off. As happens repeatedly when criminals run into armed citizens.
Have you heard of the darwin award about the guy who walked past two cop cars into a gun store, fired a round into the ceiling and announced his intent to rob the establishment? about 6 different callibers of ammunition were discovered in his corpse... seriously what was going through his head? ...y'know besides the bullets...