Fits Glock 17 Gen 1, Gen 2, Gen 3, and Gen 4 pistols in 9mm Luger. Genuine Glock OEM factory replacement - the same barrel installed in your G17 at the Glock factory in Smyrna, GA. Drop-in fit, no gunsmithing. Finish: matte black nitride - the original factory coating, durable and corrosion-resistant. Specs Manufacturer: Glock, Inc. (factory OEM) Caliber: 9mm Luger (9x19) Barrel length: 4.49" Finish: matte black nitride Fits: Glock 17 Gen 1, Gen 2, Gen 3, Gen 4 Will NOT fit: Glock 17 Gen 5, Glock 43, or any other model Drop-in factory replacement - no fitting required Use case: factory service-parts replacement, or a clean OEM swap for a build starting from a stripped slide blank Confirm your slide is a Glock 17 Gen 1-4 pattern before ordering. Lube the wear surfaces and chamber before first range trip; no special break-in beyond standard cleaning is required for a factory-spec OEM barrel. DISCLAIMER: "GLOCK" is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and 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 additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products and parts visit www.glock.com.