If you've already purchased an FDP carbine or pistol with a non-threaded barrel but are looking to upgrade to run a silencer, this is a direct drop in replacement to get you there. [embed]https://youtu.be/4-umEnytboU[/embed] Technical Specs Material: 416R Stainless Finish: Black Nitride Surface Finish: 32 RA Threads: 1/2 x 28 Twist Rate: 1-10 Right Hand Included Components ZEV FDP threaded barrel Thread Protector Shipping Information NOTE: Item cannot be shipped to California, New York, Connecticut, Illinois, or Washington