AB Suppressor Raptor Muzzle Thread Adapter 1/2x28 to 5/8x24 TPI 17-4 PH Bronze. 62 suppressor to work with other hosts. Each adapter is machined with all mating surfaces in one process. Specifications for AB Suppressor Raptor Muzzle Thread Adapter: Manufacturer: AB Suppressor Color: Bronze Fabric/Material: 17-4PH Stainless Steel Threads per Inch: 1/2x28 to 5/8x24 Weight: 1.4 oz Package Contents: AB Suppressor Raptor Muzzle Thread Adapter AB Suppressor TA-1/2-28: Raptor Muzzle Thread Adapter 1/2x28 to 5/8x24 TPI 17-4 PH Bronze