Glock Inc. Glock Handgun Barrel for G34 Gen 3/4 9mm Luger 5.31" Black. 31. This is a factory original Glock Part. It is made to the same high standards in material and workmanship as the parts that originally came in your Glock firearm. This part is perfect to replace your worn or damaged parts or to have as a spare to keep your Glock in top operating condition. Package Contents: Glock Handgun Barrel for G34 Gen 3/4 9mm Luger 5.31 Black Glock G34 9mm Barrel 5.31. This is a factory original Glock Part. It is made to the same high standards in material and workmanship as the parts that originally came in your Glock firearm. This part is perfect to replace your worn or damaged parts or to have as a spare to keep your Glock in top operating condition. 7186