Yep that's what I was thinking. I like the Liberty cans to, but the SDN6 is a little shorter.
I personally was going to get the SDN6 but since it was sold out when I wanted to do paperwork, I picked up M4-2000 instead. Oh well, I am happy with it! I rather have a dedicated can than a subcaliber can. Saker 556 and SR5 is next on my list, whomever release it first will get my business. I always say that and end up getting all of it hahah