From The Truth About Guns:

Introduced by U.S. Rep. Mike Lee, R-Utah, the “Silencers Help Us Save Hearing Act,” aka SHUSH Act, would change current law and treat silencers the same as other firearms accessories.

Senate cosponsors of the SHUSH Act include Republican Sens. Rick Scott of Florida, Pete Rickets of Nebraska, Roger Marshall of Kansas and John Curtis of  Utah. The measure is being supported by the NRA, the National Association for Gun Rights (NAGR), GOA and the NSSF.