The M136 AT4 is a portable one-shot, disposable, Anti-Tank Rocket Launcher built in Sweden by Saab Bofors Dynamics. Therefore, unless this M136 AT4 had a rocket in it, it was just a useless tube. The article doesn't indicate whether it was already spent or not, but I'd bet dollars to doughnuts that it was just an empty tube that someone got the libtards to pay anywhere from $100 to $200 in exchange for dropping it off.

The essential American soul is hard, isolate, stoic, and a killer. It has never yet melted. ~ D.H. Lawrence