Infinite Product Solutions Infinite Tapered Thread Adapter Black Phosphate QD Infinite Muzzle Thread. Built with the precision and durability you expect from Infinite this adapter is perfect for firearm enthusiasts looking to enhance their setup. The internal threads come in most standard barrel thread options while the tapered external thread locks installs securely and reliably. The QD option is compatible with all Gen 1-4 Infinite Muzzle Brakes and Flash Hiders. Tapered Thread Adapter specifically fits Infinite Product Solutions brand QD muzzle brakes and flash hiders. It's a quick disconnect system which was developed that is particular to Infinite Product Solutions brand QD threaded line of muzzle products. Specifications for Infinite Product Solutions Infinite Tapered Thread Adapter: Manufacturer: Infinite Product Solutions Color: Black Finish: Phosphate Fabric/Material: 4140 Steel Weight: 1.488 oz Last Chance: Yes Width: 1.13 in Height: 0.82 in Length: 1.25 in Features of Infinite Product Solutions Infinite Tapered Thread Adapter Converts various standard barrel threads to Infinite 10 and 12 Inch Sound Redirects Precision manufactured Ideal for firearm enthusiasts looking to forward sound and concussion Provides a wide range of accessory options Fits both rifles and pistols Wrench flats for easy and secure installation Engraved for easy thread identification Corrosion resistant Package Contents: Infinite Product Solutions Infinite Tapered Thread Adapter Infinite Product Solutions AD-TPR-4140-PHO-QD: Infinite Tapered Thread Adapter Black Phosphate QD Infinite Muzzle Thread