I have never seen assault rifles for sale there, nor have I seen any high capacity magazines.
I have seen semiautomatic rifles based on Eugene Stoner's AR-15 design. I have seen standard capacity 30 round STANAG magazines.
These idiots at "New Yorks Trinity Wall Street Church" (whatever that is) are blabbering on a topic of which they know nothing.
There was a time when Walmart sold handguns, until the screaming of the Brady Bunch caused them to quit.
Then a few years later they stopped selling military style semi autos for the same reason.
Glad to see the semi-auto rifles back on the Walmart shelves. Now wish they would start selling handguns again.
For magazines go to Cabelas.