According to this Qoura answer [1], they are using American weaponry after all, which they got from what was left behind in Iraq: [1] http://www.quora.com/Why-

According to this Qoura answer [1], they are using American weaponry after all, which they got from what was left behind in Iraq: [1] http://www.quora.com/Why-are-ISIS-militants-driving-Texas-made-Toyota-trucks-apparently-modified-for-U-S-Special-Forces http://www.quora.com/Why-are-ISIS-militants-driving-Texas-ma...