How about loading the rifle with Sevin for total destruction of aphids in the White House Rose Garden?
Clearly, a weapon of mass destruction (WMD).
I wonder how it would go over in my neighborhood if I sat there in my front with an M-14 and added some nitrogen fertilizer to my lawn. Then maybe I could gas a few hornet's nests, and as the day wore on into the evening, I could send up some citronella clouds to keep the 'skeeters away.