Colo. Rev. Stat. § 18-12-405 – Locking device required - penalty.

(1)
1. (a) Every licensed gun dealer, as defined in section 18-12-506, shall provide with each firearm sold or otherwise transferred a locking device capable of securing the firearm.
2. (b) This subsection (1) does not apply to the transfer of an antique firearm, as defined in 18 U.S.C. sec. 921 (a)(16), as amended, or a curio or relic, as defined in 27 CFR 478.11, as amended.
(2) Every licensed gun dealer shall post, in a conspicuous location on its premises and at any other location at which the dealer sells a firearm, either the notice developed as part of the firearms safe storage education campaign described in section 25-1-131 (2) or the following notice, in writing, on a printed card, with each letter at a minimum of one inch in height:
NOTICE
Unlawful storage of a firearm on premises you own or control may result in imprisonment or fine. Unlawful storage of a firearm in a vehicle may result in a fine.
(3) A licensed gun dealer that violates this section is guilty of an unclassified misdemeanor punishable by a fine of not more than five hundred dollars.

Source: L. 2021: Entire section added, (HB 21-1106), ch. 39, p. 148, § 5, effective July 1. L. 2024: (2) amended, (HB 24-1348), ch. 178, p. 970, § 5, effective January 1, 2025.

Cross references: For the short title (Promoting Child Safety Through Responsible Firearm Storage Act) and the legislative declaration in HB 21-1106, see sections 1 and 2 of chapter 39, Session Laws of Colorado 2021.