Are Suppressors Legal in Colorado?

ATF's current Colorado compendium lists the state's firearms provisions without a suppressor-specific possession entry. Federal NFA approval remains tied to the registered person or entity, and Colorado wildlife, discharge, and local land-use rules remain separate from ownership.

Suppressors are federally legal to own under the NFA. As of January 1, 2026 the One Big Beautiful Bill Act (signed July 2025) zeroed the federal making and transfer tax on suppressors, formerly $200. Form 4 or Form 1, fingerprints, the NICS background check, and NFA registration are all still required; ATF eForm approvals currently run days to a couple of weeks.

Scope: Firearm suppressors (silencers) as defined by the NFA. Federal NFA compliance (Form 4 or Form 1, fingerprints, NICS, registration) is required everywhere they are legal.