
G-S173 Binary Trigger + Slide
- Glock 17 Gen 3 only
- Selectable semi-auto and Binary firing modes
State Legality MatrixBinary TriggersAlaska
Statute-cited, not legal advice, last verified 2026-10-20
Legal
Yes. No state statute restricts binary triggers.
The statute in practice
Alaska Statutes section 11.61.200(a)(3) makes manufacturing, possessing, transporting, selling, or transferring a prohibited weapon misconduct involving weapons in the third degree, a class C felony. The prohibited-weapon list in section 11.61.200(h) includes a firearm capable of shooting more than one shot automatically, without manual reloading, by a single function of the trigger, and section 11.61.200(c) makes National Firearms Act registration an affirmative defense.
Federal law
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.
Federal baseline verified 2026-10-20. 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.
Common questions
Yes. No state statute restricts binary triggers.
What to buy
In a green state, these are the binaries that matter. Franklin Armory's BFSIII line covers AR, Scorpion, Stribog, and B&T hosts, and the Fostech Echo AR-II is the drop-in AR alternative.




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