Mexican organized crime spends millions to purchase weapons and munitions. Every year, authorities trace between 5,000 and 7,000 guns from when they are seized in Mexico back to sources in the US. According to J.J. Ballesteros, the Bureau of Alcohol, Tobacco, and Firearms Chief in Corpus Christi, Texas, this number represents "a drop in the bucket." Ballesteros admits that criminals can literally outfit an army from one gun store, "and it's being done," he said. The most popular guns are the AR-15, AK-47, and Tec-9 pistol.