BLACKHEART IMMUNITY FLOATING GUN CASE REALTREE MAX 5 The Immunity floating gun case combines a durable, PVC shell with a sealed-in layer of buoyant foam for padding and flotation. Features a fold over opening with a waterproof zipper for quick, quiet opening in the blind. An adjustable shoulder strap with shoulder pad and carry handles make it comfortable and easy to carry. A pocket built with a waterproof zipper is located on the front of the case for choke tubes, shell holders or any other small accessories. Fits most guns up to 54�.