Okay, often associated with CSM but sometimes used by Assault Marine, what would be its stats?
My guess:
Astartes Chain Axe:
Damage:
1d10+5 R
Pen:
4
Special:
Tearing, Unbalanced
Wt:
16
Req.:
5
Renown:
-
Astartes Chain Axe
Seems decent. I'd raise the req a bit - to 6/7, just because it's not as common as a chainsword.