Faxon Firearms M18x1.5 Barrel Adapter Stainless Steel Black. 5 barrels. The Faxon Direct Thread Hub M181.5 is CNC-machined from Grade 5 Titanium (Ti-6Al-4V) to deliver exceptional strength-to-weight performance corrosion resistance and repeatable precision. Designed to connect HUB-compatible suppressors directly to metric-threaded barrels this lightweight mount provides a durable perfectly concentric interface for precision rifle applications. Featuring M181.5 internal threads to fit many European and magnum barrels and 1.37524 UNS (HUB) external threads for suppressor attachment this hub offers broad industry compatibility. Its fully compatible with Faxon Barrels and Faxon HARMONIX and CORESYNC suppressors as well as most other HUB-mount suppressors on the market. Each unit is CNC-machined deburred and inspected in-house at Faxon Firearms Cincinnati Ohio facility for a perfect fit and finish. Specifications for Faxon Firearms M18x1.5 Barrel Adapter: Manufacturer: Faxon Firearms Finish: Stainless Steel Fabric/Material: Stainless Steel Features of Faxon Firearms M18x1.5 Barrel Adapter Material: Grade 5 Titanium (Ti-6Al-4V) Internal Threads: M181.5 (metric barrel standard) External Threads: 1.37524 UNS (HUB mount standard) Compatibility: Faxon Barrels HARMONIX CORESYNC and most HUB mount suppressors Finish: Natural passivated titanium CNC machined & inspected for perfect fit and concentricity Package Contents: Faxon Firearms M18x1.5 Barrel Adapter Faxon Firearms FF-MD-SIL-HUB-M18-01: M18x1.5 Barrel Adapter Stainless Steel Black