I found some interesting information regarding 4.0 extendable weapons. Apparently we can upgrade our DDL weapon to a level 65-68 version, because if you look at your DDL weapon you can see that they have a level limit of 63 or lower which means that you cant use it in 4.0 if you are level 65. DLR Extendable Weapon Upgrade System Source: Link Korea after popular demand finally decided to release the 65-68 versions of the DLR extendable weapons. Today they finally released information on how to upgrade them on the test server. You can purchase a design to upgrade the weapon from level 60-63 to 65-68 from an NPC at one of the base camps in Katalam. The designs cost a little over 5mil. Although I am unsure where you aquire the materials to upgrade the weapons. The Weapons: Sadly i dont understand anything in Korean, so if anyone does understand then be a lamb and translate it for us Lets just hope that the ingredients for the upgrade will be available after the update ;O I take no credit for this information, i simply googled it.