Agency Arms Mid Line Barrels are for those who desire functionality as well as a unique appearance. While each of Agency's lines maintains the same core accuracy and reliability, their Mid Line focuses on additional machining enhancements and appearance while only having a modest price increase over the Standard Line models. Features : 416R Stainless Steel Construction 1/10 Twist Titanium Nitride (TiN) Gold Finish Sits Flush with Slide Deep Crown Large Agency A machined top of the Lockup Large AGENCY Machined on Port Side of the Lockup 7 Gear Flutes Machined Around Circumference of Barrel Fits GLOCK 19 Gen 5 Pistols GLOCK is a federally registered trademark of Glock, Inc. and is one of many trademarks owned by Glock, Inc. or Glock Ges.m.b.H. Neither 3CR Tactical nor this site are affiliated in any manner with, or otherwise endorsed by, Glock, Inc. or Glock Ges.m.b.H. The use of "Glock" on this page is merely to advertise the sale of Glock pistols, parts, or components. For genuine Glock, Inc. and Glock Ges.m.b.H products, visit https://us.glock.com . Finish note: The TiN coating will show wear at metal-to-metal contact points - primarily the locking lug face and barrel hood - over time. This is normal and does not affect function or accuracy.