Are Binary Triggers Legal in South Carolina?

South Carolina section 16-23-210 defines a machine gun through automatic fire of more than one shot, without manual reloading, by a single trigger function. Article 3 does not separately name binary triggers or rate-enhancing trigger devices, making the one-shot-on-pull and one-shot-on-release sequence central to the statutory comparison.

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.