https://www.houstonpublicmedia.org/articles/news/2016/01/04/132588/as-confusion-remains-across-houston-texas-open-carry-gun-law-begins/ This latest shooter can just walk in any gun shop in Texas at the age of 18 and buy an AR 15, body armor, and extra magazines. https://www.bustle.com/p/what-are-texas-ar-15-gun-laws-like-the-sutherland-springs-shooting-has-ignited-criticism-3228550#:~:text=In%20Texas%2C%20residents%20are%20allowed%20to%20purchase%20AR-15,does%20not%20need%20to%20be%20re-loaded%20between%20shots. Just walk in, no permit, no waiting time, no registration, just walk in, load up and go out and shoot.