416R Polished
Barrels // QMB6-SS
In stock // Ships in 1-2 business days
The 12.5-inch, 1:7-twist 6mm ARC barrel developed for the SARC-6, offered on its own in heavy-profile 416R stainless or 4140 chrome-moly vanadium, with optional Black or FDE Cerakote. Suppressor-ready, gauge-verified.
Ships direct where lawful. No FFL required.
Quadradyn QMB-6 6mm ARC Barrel
Even without HIPR, this barrel is highly accurate at 650 yards and capable up to 800. With the release of HIPR-6 in 2027, we expect to be reaching confidently to 1,000+ in this exact 12.5-inch barrel.
Read the full analysis // FILE-004 in IntelligencePrecision 416R stainless suits machining consistency; 4140 chrome-moly vanadium suits field use. Both share one chamber, twist, crown, and suppressor-interface geometry and take Black or FDE Cerakote.
Same print // profile and steel selected by missionEvery barrel is verified for chamber and headspace, bore and groove consistency, crown geometry, gas interface, and muzzle-thread alignment before release. That is the same measurement-first discipline applied to every complete SARC-6.
Dimensional release plan // gauge-verified before dispatchQMB-6 // PRODUCTION BUILD // SPECIFICATIONS PER THE QMB-6 BARREL PAGE
Ordering
Ships direct to you. No FFL required. Rates and delivery estimates are calculated at checkout. We ship within the United States only.
New, uninstalled, unmodified components in their original packaging may be returned within 30 days of delivery for a refund. We can only accept a return if you have not attempted to install the part on a firearm. Contact us for a return authorization before shipping anything back.
State law limits where we can ship a barrel shorter than 16 inches. Barrels do not ship to California, Connecticut, the District of Columbia, Hawaii, Illinois, Maryland, Massachusetts, New Jersey, New York, Rhode Island, Virginia, Washington, Puerto Rico, Guam, the U.S. Virgin Islands, American Samoa, the Northern Mariana Islands, or APO/FPO/DPO addresses. Confirm that the barrel, and the firearm it will go on, are lawful where you live before you order.
