The Flasc double threaded Barrel extension is the next step towards complete customization in a barrel kit! You can customize your marker to make it look and perform however you want, so why not your barrel too? This Extension works much like a front in a traditional barrel kit, though it is also double threaded! With this added feature you can add on more extensions or the tip of your choice! There's endless possibilities with the Flasc Paintball Double Threaded barrel Extension. Available in 3 flavors: Ported, Un-ported and Double Ported to allow you to build your barrel however you want it!