No surprise. They are everywhere, easy to obtain. Heck, they raffle them of as prizes in 'Murica.
https://www.huffingtonpost.com/entry/neosho-baseball-team-features-ar-15-raffle_us_5a8a02f2e4b00bc49f455f30
https://www.nytimes.com/2018/02/20/nyregion/parkland-shooting-raffle-rifle.html
and many, many more.