Expertly crafted from premium 303 stainless steel for robust durability and long-lasting performance. Meticulously designed to safeguard your threaded barrel, providing reliable protection when no other accessory is attached. Precision engineering prevents damage and wear, maintaining the integrity of your firearm's threading. Ensures seamless compatibility with future attachments. Features a sleek and unobtrusive design. An indispensable addition for any firearm enthusiast seeking to preserve the quality and functionality of their equipment.This thread protector is typically used for 9mm caliber threaded barrels, including those used in 9mm conversion threaded barrelsCompatible with all barrels featuring 1/2-28 threading