Question about Khymera

By player437522, in Only War

I haven't found any answer in the forum, so my question is:

How many arms does Khymera have? It has the Multiple Arms trait but without any number.

From the Images i can find, it appears to be set up similar to a dog, with four legs in a roughly animal fashion, and then two bladed appendages coming out of its back just behind its shoulderblades