Colorado § 29-11.7-105 - Firearm serial number check - procedure - processing fee - penalty.

§ 29-11.7-105. Firearm serial number check - procedure - processing fee - penalty.

(1) (a) A federal firearms licensee, as described in section 18-12-101, may request a firearm serial number check prior to purchasing a firearm from an individual. If a federal firearms licensee's place of business is located within incorporated city limits and requests a firearm serial number check, the licensee must request the firearm serial number check from the police department within the city limits in which the federal firearms licensee's place of business is located. If a federal firearms licensee's place of business is located in an unincorporated part of a county and requests a firearm serial number check, the licensee must request the firearm serial number check from the sheriff's department of the county in which the federal firearms licensee's place of business is located.

(b) Upon request by a federal firearms licensee, a sheriff's office or police department shall perform the firearm serial number check and respond with the result of the check to the licensee within three days after the request.

(c) The firearm serial number check must include information regarding whether the gun is reported stolen, lost, or is involved in an open criminal investigation.

(d) A sheriff's office or police department shall establish a reasonable and uniform system to receive a firearm serial number check request and provide a response to a requesting licensee.

(2) (a) A sheriff's office or police department may charge a fee to perform the firearm serial number check. The fee amount must reflect the actual and indirect costs to the sheriff's office or police department of performing the firearm serial number check.

(b) If a sheriff's office or police department does not perform the firearm serial number check and provide a response to the licensee within three days after the request, the sheriff's office or police department shall refund, or shall not charge, the licensee for the firearm serial number check.

(3) Each sheriff's office or police department shall begin providing firearm serial number checks no later than July 1, 2026.

(4) If the federal government allows a federal firearms licensee to access the federal government's firearm tracing program to allow the federal firearms licensee to perform a firearm serial number check, the federal firearms licensee may perform the firearms serial number check themself. The federal firearms licensee is still subject to the reporting requirements described in subsection (5) of this section. This subsection (4) will take effect as soon as the technology and infrastructure for a federal firearms licensee to perform a firearm serial number search is available.

(5) (a) If a firearms dealer who holds a state permit to deal firearms pursuant to section 18-12-401.5 reasonably believes, knows or should know, or becomes aware that a person sold or attempted to sell a firearm that is stolen, lost, or involved in an open criminal investigation, the dealer shall report that information to a law enforcement agency with jurisdiction over the dealer's place of business.

(b) Failure to make the report as required by this subsection (5) within forty-eight hours after the dealer reasonably believes, knows or should know, or becomes aware of the firearm being stolen, lost, or involved in an open criminal investigation is subject to the penalties described in section 18-12-401.5 (7).

Source: L. 2025: Entire section added, (SB 25-205), ch. 356, p. 1918, § 1, effective August 6.