The Five Stone Tactical HUB Adapter is a Plan B-compatible suppressor adapter designed to provide a secure connection between compatible suppressors with a 1.375x24 Bravo (HUB) thread interface and Plan B right-hand muzzle devices. Precision-machined from 17-4 PH H900 stainless steel for enhanced durability and corrosion resistance. Integrated 1-1/4-inch wrench flats simplify installation and removal, while its compact 2.2-ounce design adds minimal weight to your firearm setup. Features17-4 PH H900 Stainless Steel1.375-24 Bravo Thread Size Suppressor InterfaceCompatible with all Plan B RH muzzle devices1-1/4" Wrench FlatsWeight 2.2 oz