Infinite Product Solutions 9/16-24 - Thread Adapter Polished Stainless Steel. 30 Cal compatible) barrel threads. This adapter allows for the seamless attachment of 5/8-24 threaded accessories to your 9/16-24 threaded barrel offering enhanced flexibility and convenience. Compatible with L1A1 Browning Boss (A-Bolt) select Winchester models select 6.5 Grendels and older Weatherby Contour 3 Barrels. NOT COMPATIBLE with .40 S&W or 10mm. Specifications for Infinite Product Solutions 9/16-24 - 5/8-24 Thread Adapter: Manufacturer: Infinite Product Solutions Finish: Smooth Fabric/Material: Stainless Steel Threads per Inch: 5/8x24 Gun Make: Heckler & Koch Gun Model: Heckler & Koch MP5 Weight: 1.12 oz Last Chance: Yes Width: 0.79 in Height: 0.79 in Length: 1.47 in Caliber: .30 Carbine .300 AAC Blackout 6.5mm Creedmoor .308 Winchester .40 S&W Features of Infinite Product Solutions 9/16-24 - 5/8-24 Thread Adapter Converts 9/16-24 (.30 Cal) threaded barrels to U.S. standard .30 cal threads 5/8-24 Precision manufactured Common rifle thread length Wrench flats for easy and secure installation Corrosion resistant Package Contents: Infinite Product Solutions 9/16-24 - 5/8-24 Thread Adapter What firearm models does the manufacturer say Infinite Product Solutions 9/16-24 - 5/8-24 Thread Adapter is compatible with? The manufacturer suggests that Infinite Product Solutions 9/16-24 - 5/8-24 Thread Adapter is compatible with Heckler & Koch MP5Infinite Product Solutions 916RH-5824-SS: 9/16-24 - 5/8-24 Thread Adapter Polished Stainless Steel