User blog comment:Kogath/Monster Hunter X Discussion/@comment-26421638-20150716122159/@comment-5853890-20150716174220

Pretty sure that's Agna CB, upon closer look the patterns they're more similar to Agna's back than Gyp's weapon patterns. Gyp's SnS design looks very similar to this CB but his SnS has a spine of some sort where the spines come out of.