From the look of it, I'd guess it is a 50 caliber rifle. FReeper Eaker posted the picture on the hurricane thread. I believe those are his kids ready to welcome the looters.
Indeed those are my kids and that is a .50BMG.
The storm turned 2 degrees east after I posted that pic.
A few more pics and it will swing over and hit France. They don't shoot back!
I couldn't quit laughing as the kids kept saying, "Just one more gun!"