Representatives Jeff Duncan (R-SC-3) and John Carter (R-TX-31)
introduced legislation on January 9 that will eliminate the paper trail
and federal tax on firearm suppressors. Basically this legislation would remove suppressors from the purview of the NFA 34 and make the items the equivalent of firearms. This means that you'd need a background check for your gun, and if purchased separately, another for the can.
OTOH I suppose if you wanted to make your own can, you could do that in most states without asking federal permission.
No number is reported as being assigned to this legislation but it goes under the name of the Hearing Protection Act, so when dropping your congress critters an e-mail, ask them to co-sponser this. Protect your hearing! It's For The Children!
While you're at it you might also suggest that treating an accessory like a suppressor like a full-blown firearm might just be a bit much and think of the trees that would be saved by eliminating those parts of the bill that do this.
Don't forget to add a line asking that funding for the BATFEIEIO be eliminated, salaries for all its employees be reduced to the federal minimum of $1/yr, their buildings vacated and sold off, and any and all records associated with the agency be consigned to an incinerator immediately following a full and complete investigation of Operation Fast and Furious.