Upgrade or replace your existing outer barrel assembly on compatible Elite Force Glock 17 gas blowback airsoft pistols, with the Helix T-17. This barrel is constructed fully from high quality metal with a hard coat anodized finish for the utmost realism and durability against the elements. Original Helix 9mm markings are engraved into the rear of the barrel and are visible when installed into the Glock 17. The 14mm positive threading allows for the combination of this barrel with other accessories such as a barrel extension, flash hider, mock suppressor, or thread protector. Upgrade your compatible Elite Force Glock 17 Gas Blowback Pistol with the best parts available and get back on the battlefield confident your arsenal is ready for whatever may come your way.