Since there doesn't seem to be a thread about it... on PTR you can buy Arsenal: Draenor Challenger's Armaments for 10k gold from the CM weapon vendor. It can be bought by alts that did not complete CM gold. Using it adds all items to your collection, but you can also buy each weapon individually for 1k gold. You have to purchase the armarment on one alt only.
I did CM gold on my monk and purchased the armarments with my pally (hence the different colored item links, apparently).