Syndicate by Agency Barrels are for those who prefer a purely functionally minded design. While each of Agency Arms lines maintain the same core accuracy and reliability, the Syndicate Line's focus is functionality and affordability for the end user. Specifications Twist: 1/10 Quality: 416R Stainless Steel Rifling: Pulled broached/ Saami Spec 9mm Rifling Fit: *GlockA(R) 19 Gen 1-4 Compatible (NOT GEN 5 COMPATIBLE) Caliber information machined on the rear of the lockup. Identified as "919" Threading (Optional): 1/2 x 28 Thread protector (Price included with threading): Yes, In matching finish! Finish Options: Titanium Nitride (Gold) Subtle Syndicate "S" Machined on the rear, port side of the lockup. ""GLOCK A(R) ", "Gen 4", and "G17" - "G43" are several federally registered trademarks of many owned by Glock, Inc. or Glock Ges.m.b.H. Agency Arms is not affiliated with or endorsed by Glock, Inc. or Glock Ges.m.b.H."