All I own is a KV-1 but what I am told it is bigger than the tiger body wise although the barrel is shorter but I don't know about the KT...There is a ton of room in the hull but I am not sure about the 3:1s I have yet to get mine..But the KV-1 is a great tank it can climb over a lot of stuff, sometimes things that are 2-3 inches...it is also a very sturdy tank and doesn't throw tracks at all...The arisoft gun shoots pretty hard..Hope this helps</p>