Faxon Firearms Plan-B HUB Adapter Features The Faxon Firearms Plan-B HUB Adapter is machined from 17-4 PH stainless steel chosen for its strength and corrosion resistance under the repeated heat and stress cycles a suppressor interface endures. Precision threads of 1.375-24 UNS-2A on the primary side and 29/32-24 UNEF-2B on the hub side ensure a secure repeatable connection every time a suppressor is mounted or removed. This adapter is engineered to interface standard Plan B muzzle devices with hub-mount suppressor systems like Faxon s own HARMONIX and CORESYNC lines. Shooters who already own Plan B compatible muzzle devices gain a direct path to hub-mount suppressor compatibility without needing to swap their existing muzzle hardware. A black Nitride finish coats the adapter for added corrosion resistance and a durable surface that withstands the fouling and heat generated during suppressed fire. Designed and manufactured entirely in the USA the adapter reflects Faxon s commitment to precision machining and tight tolerances. This straightforward accessory solves a specific compatibility challenge for suppressor owners transitioning between muzzle device standards. For shooters running Plan B compatible muzzle devices who want access to hub-mount suppressors the Faxon Firearms adapter is a precise reliable solution. Faxon Firearms Plan-B HUB Adapter Specifications Manufacturer: Faxon Firearms Series: HUB Adapter Model: Plan-B Color: Black Material: 17-4 PH Stainless Steel Finish: Nitride Thread Pattern: 1.375x24 Country of Origin: USA Available At: GrabAGun