I don’t see arms dealing. If he was running guns, he would not have needed to buy ARs through gun shops, he would have had his own source. Throw in the detail that he wired 100K to his girlfriend in the Philippenes, ostensibly to buy a house, and sex trafficking seems more likely. He had a hidden source of income and the gambling was his means to launder it.
Agree that arms dealers don’t buy local retail guns to sell.
But this article says the Philippine money wire never happened. So I don’t know what to believe.