(Leah Hogsten | Tribune file photo) SilencerCo's public relations specialist Matt Pinnell holds the Maxim 9 Short Configuration and the Maxim 9 Long Configuration guns in the company's gun safe in this May, 28, 2017, file photo. SilencerCo is one of the country's largest manufacturers of silencers for guns of all kinds. Utah Sen. Mike Lee has introduced legislation — previously backed by the company — that would eliminate federal regulation of firearm silencers.