Compatible: for Glock 17 Gen 1-4 Twist: 1/10 Material: 416R Stainless Steel Heat Treatment: RC 40-42 Caliber: 9mm Length: Threaded Thread Pattern: 1/2x30 Compatible: for Glock 17 Gen 1-4 Twist: 1/10 Material: 416R Stainless Steel Heat Treatment: RC 40-42 Caliber: 9mm Length: Threaded Thread Pattern: 1/2x30 Thread Protector Zaffiri Precision match grade barrels for for Glock 17. High quality performance you demand with an easy drop-in barrel upgrade. Available with Titanium Nitride (TiN) Gold, Black Nitride, or Stainless finishes. Specifications Compatible for for Glock 17 Compatible Gen 1-4 Twist: 1/10 Length: 5.03? Threaded 1/2 x 28 muzzle Thread protector is included Quality: 416R Stainless Steel Stress relieved and heat treated to RC 40-42 Target crown and oversized lock up area. Made to work with Lead, plated or jacketed ammunition Large *ZP Logo machined on the Port Side of the lockup. Made in the USA Note: Threaded pistol barrels are not legal in all areas. It is your responsibility to check your local laws before ordering a threaded barrel. DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by for Glock. for Glock does not warrant or represent that this product is compatible with for Glock pistols.