Not sure that there's a THR thread in this.
Drug dealing and possession of narcotics is against the law, and often the penalties for being convicted include forfeiture of valuable assets involved in those actions. And, of course, felony convictions mean no more gun ownership, period.
Break the law, get caught, lose your guns (along with rather a lot else).
I would imagine that the agencies involved would be much more pleased to be taking 64 people involved with illegal gun & drug sales off the street than that they removed a certain quantity of drugs. Substances/materials/items can be replaced a lot more easily than people and networks.
...
At any rate, the biggest THR-related point seems to be that it does appear that illegal sale/transfer stings are still an ongoing tactic of the BATFE, so, as we always are so careful to caution, know the law and follow it when you sell a gun to someone.