Are Binary Triggers Legal in Colorado?

ATF's current Colorado compendium lists the state's firearms provisions without a binary-trigger, trigger-activator, or multiburst-trigger entry. A binary installation still has to be checked against the host firearm's classification and any applicable local rule rather than assuming the federal device classification answers every Colorado question.

Binary triggers are legal under federal law and are not machine guns under 26 U.S.C. § 5845(b); ATF treats the trigger pull and the trigger release as two separate functions of the trigger, so one round is fired per function. Cargill v. Garland (2024) concerned bump stocks, not binary triggers, and does not change this.

Scope: Binary triggers (Franklin Armory BFSIII and similar): fire one round on trigger pull and one on release. Forced reset triggers are a separate class.