The difference with the bumpstock vs. a suppressor is that bumpstocks were not tracked. They had no serial number and no record of who bought and sold them plus their intent was to exploit a loophole in the law.
A suppressor is tracked, has strict guidelines on who can own them, how they are stored, transported, etc. The press and their masters in the DNC has not picked up on suppressors like they did bump stocks.
I never understood how Bumpstocks lasted as long as they did before they were banned. I wonder how many thousands of people out there have them and don't even know they are banned now.
I do wonder if this guy had a legitimate suppressors or did he buy one of those "solvent traps" from the idiots at a gun show. I stood there in amazement at one gun show in Chattanooga while the nimrods selling the adaptor to put an oil filter on the end of a gun openly talked about using them as cheap suppressors. I've not seen them at the last gun show or two. Maybe their dumbasses are in jail.