Proposed Missouri Bill Seeks to Loosen Gun Suppressor Laws

A newly proposed bill in Missouri aims to relax restrictions on firearm suppressors, sparking debate across the state. Representative-elect Mike Costlow (R-St. Charles) is leading the effort with a pre-filed House bill that would prevent prosecution for individuals who own or sell gun suppressors in Missouri.

Costlow argues that suppressors, often incorrectly called “silencers,” could offer benefits to hunters by reducing the damaging effects of repeated gunshot noise. “Suppressors slightly reduce the volume,” Costlow explained. “They bring a gunshot down from 150-160 decibels to about 120-130, which can be significant for hearing protection.”

The bill also includes a requirement that suppressors bear a “Made in Missouri” stamp, focusing on intrastate commerce to avoid federal oversight. “Anything crossing state lines falls under federal regulation,” Costlow noted. “But when it’s made, sold, and used entirely in Missouri, it’s regulated by Missouri.”

However, the proposal is drawing concern, particularly from law enforcement and urban community leaders. James Clark, Vice President of Public Safety with The Urban League of Metropolitan St. Louis, acknowledged potential benefits for hunters but warned of increased risks in urban areas. “Having a silencer in a rural community is different than having one in the urban core,” Clark said, adding that suppressors could make it harder for citizens and law enforcement to detect gunshots.

Clark also raised concerns about the impact on tools like ShotSpotter, a system used in the St. Louis area to pinpoint gunfire locations. While suppressors don’t completely silence shots, they could make detection more challenging. “This will make it a high-risk proposition in urban areas,” Clark emphasized.

Costlow remains open to input as the bill progresses, stating, “This has a long way to go. We’re going to have a lot of input. This is just the beginning.” The new legislative session begins on January 8, 2025.

This proposal comes amid increasing concerns about firearm accessibility and a rise in school shootings across the United States. Critics fear the bill could further complicate efforts to address gun violence, while supporters argue for the safety and hearing benefits suppressors could provide.