Caliber: 5.56 NATO, 22 ARC, 350 Legend, 338 ARC (2025). Manufactured in-house at Cincinnati facility. 16” or 20” 4150 Mil-Spec Steel or 416R stainless-steel button-rifled barrels and bolt carrier groups. Sentry-X includes ambi charging handle and safety selector, Faxon trigger by Rise Armament, upgraded furniture. Lifetime warranty. SEE POLITICAL PANIC PRICING.