The Spec Ops 9 uses the concealment hammer and beaver tail combo. I'm not to sure on this one, but in order for you to use the concealment hammer, I think you'd have to go with the concealment beaver-tail as well. It's a bit shorter than the standard one. So the short, answer is yes. You could request it in one of your builds if you'd like. I'm sure someone will be along shortly to correct me.