Buy a Velocity standard or threaded G19 barrel. These are made from high-grade materials and deliver unparalleled accuracy and performance. Both are compatible with Glock 19 / Gen 3, 4 & 5.
Killer Innovations Velocity Threaded Barrel Fits GLOCK 19 Gen 3-5 - TiN
Killer Innovations Velocity Barrel for Glock 19
Killer Innovations Velocity Barrel for SIG P320 X-Compact
Killer Innovations Velocity Compensator for Glock 9mm
VELOCITY COMPENSATOR FOR GLOCK - Killer Innovations
SANCER BARREL FOR GLOCK 17 & 19 - Killer Innovations
First Glock build : r/GlockMod
VELOCITY V1 SLIDE FOR GLOCK - Killer Innovations
Killer Innovations V2 Velocity Glock Slide for Glock 19 Gen 3 - Milspec Retail
Killer Innovations Barrels for Glock
Killer Innovations Velocity Slide for Glock 19