Quadradyn is a small, founder-run arms company in Pompano Beach, Florida. It exists because one cartridge family deserved a rifle designed around it rather than adapted to it.
01 // The founder
James, Quadradyn’s founder, has spent twenty years working with firearms. He is a certified gunsmith, a certified armorer, and a certified Cerakote applicator, and he still does the work himself: the fitting, the gauging, the finishing, and the test firing behind every product on this site.
02 // The idea
In 2024 James envisioned Quadradyn as a business focused on the new ARC calibers from Hornady, the Advanced Rifle Cartridges, starting with 6mm ARC. The cartridge delivered long-range efficiency and low recoil from a compact platform. What it lacked was a rifle and a magazine designed for it from the start.
03 // The pivot
In early 2026 Quadradyn built and tested an AR-15 prototype in 6mm ARC. It worked, and it carried the compromise every AR-15 in 6 ARC carries: a modified magazine with no true double stack. When ICAR-magazine-compatible lower receivers were released to the public in mid-2026, Quadradyn set the prototype aside and rebuilt the rifle around the magazine the cartridge always needed. The result is the SARC-6.
With the SARC-6, Quadradyn became the first business to sell an ICAR-magazine-compatible AR to the public.
| When | What happened |
|---|---|
| 2024 | Quadradyn envisioned. A business built around Hornady’s Advanced Rifle Cartridge family, beginning with 6mm ARC. |
| Early 2026 | AR-15 prototype. A 6mm ARC AR-15 is built and tested. |
| Mid 2026 | The pivot. ICAR-magazine-compatible lower receivers reach the public; the AR-15 prototype is abandoned and the rifle is rebuilt around the ICAR magazine. |
| 2026 | The SARC-6. The first ICAR-magazine-compatible AR sold to the public. Read the full report on the first ICAR-magazine-compatible firearm sold to the public. |
| 2027 | Two new firearms planned for public release, one of them in a completely new caliber. |
04 // What comes next
The rifle is the beginning. Quadradyn is branching into software, starting with Quadradyn Conquer, FFL management software with a planned free core release, and into anti-robotics defense, the field our Intelligence desk has been tracking as armed ground robots move from demonstration to deployment. In 2027 Quadradyn expects to offer two new firearms to the public, including one in a completely new caliber.