Talk:Crescent Rose/@comment-27144409-20151108225636/@comment-27366446-20151209152335

I would think it's a hydraulic or pneumatic tube, it could serve one of several purposes there. A. Some guns, especially high powered ones of older design, have pressure chambers to assist some of the mechanics of firing. This is incredibly rare on bolt action guns, but this is a fact that may have been overlooked by the design staff. B. As mentioned in the article, it may be able to open itself mechanically, and it's not too much of a stretch that a device of this design would use a pneumatic system to transform. It should be noted however that most other transforming weapons seem to use some form of motorized gear system.