Infinite Product Solutions 1/2-20 RH - 1/2-28 Thread Adapter Black Oxide. This allows you to use threads compatible with most .223 5.56 .22 and 9mm firearms. Made from durable 304 stainless steel this adapter ensures a secure fit and reliable performance. Upgrade your firearm with this essential accessory from Infinite and enjoy enhanced versatility. Specifications for Infinite Product Solutions 1/2-20 RH - 1/2-28 Thread Adapter: Manufacturer: Infinite Product Solutions Finish: Oxide Fabric/Material: Stainless Steel Threads per Inch: 1/2x20 Last Chance: Yes Width: 0.79 in Height: 0.79 in Caliber: 5.56x45mm NATO .22 Hornet 9mm Luger .223 Remington Length: 1.47 in Features of Infinite Product Solutions 1/2-20 RH - 1/2-28 Thread Adapter Converts CZ 452/455 and TEC 22 threads to common 1/2-28 thread Ensures secure fit and reliable performance Enhances firearm versatility Ideal for multiple calibers Precision engineered for accuracy Package Contents: Infinite Product Solutions 1/2-20 RH - 1/2-28 Thread Adapter Infinite Product Solutions 1220-1228-BSS: 1/2-20 RH - 1/2-28 Thread Adapter Black Oxide