I'm going to go with tha Mossberg JIC line. (JIC= Just in Case) They have several models. All come with either a bag or a waterproof tube that is easily attached to packs, AtVs or vstroms. http://www.mossberg.com/products/default.asp?id=28 Marinecoated version. (think stainless and salt water resistant) I can also tell you nobody beats Dales prices on Mossbergs.