Can I Complete Zetsubou No Shima With Only The Ray Gun?

In the next part of the Black Ops 3 Ray Gun Saga, we take on one of the most diversive maps in Call of Duty Zombies history: Zetsubou No Shima At the peak of the zombies intrigue, BO3 drops it's first DLC being an absolute smash hit with Elemental Wonder Weapon Bows, A Medieval Castle, an Easter Egg that if you've completed you could never forget and put that all together to get this MASTERPIECE... and today? Our mission is to complete this incredible map whilst using the most iconic zombies wonder weapon of all time... The Ray Gun. After riding off the huge success of DLC1's Der Eisendrache, we take a journey over to the Division 9 Facility of grand experimentation where Takeo Masaki's soul is located. Zetsubou No Shima has many secrets, an elevator to a hidden prison, a lot of Chtuhulu and similar style related lore, and even a Keeper protector who looks over the island. All of this combined makes for an absolutely great experience... But can I beat the Easter Egg for this map with only using... The Ray Gun?