Adams Arms Threaded/Fluted Barrel for Glock 17 Gen 1-4

Rival Arms 9mm Drop-in Threaded Barrel for Glock 17 Pistol, Black PVD - RA20G102A

Faxon Firearms Button Rifled Flame Fluted Drop-In Barrel 9mm Fits Glock Gen 2-4 G17 Full-Size, Black

Adams Arms Threaded/Fluted Barrel for Glock 19 Gen 1-4

STRIKE INDUSTRIES Threaded Barrel Glock G19 Black

Tyrant Designs Non-Threaded Barrel for Gen 1-5 Glock 19, 19X, 45 - BLK

DMA Inc. Crowned Match Barrel for Gen 1-4 Glock 17 Pistols - Black Nitride

DMA Inc. Threaded Match Barrel for Gen 1-4 Glock 17 Pistols - 1/2x28 - Black Nitride