ZEV PRO // Glock 19 Barrel (Black) // Match Grade, Gen 1-5
Blemished Agency Arms High Polished Premier Line Match Grade Drop-In Barrel (compatible with Glock® 19 Gen 1-4) - Agency Arms | Welcome to the Brotherhood
7mm Prefit Barrels All Actions, Button Rifled - Patriot Valley Arms
ZEV Technologies New Match-Grade Glock Barrels -The Firearm Blog