The black iSeries Double M4 and Short Rifle Case from SKB features a rigid foam bunk-bed system for protecting and securely positioning two M4 or short rifles. There is also convoluted foam in the lid for additional cushioning. The injection molded case is constructed of polypropylene copolymer resin and is waterproof, gasketed, dustproof and (IP67) submersible. The case is also resistant to UV, solvents, corrosion, fungus and impact damage (MIL-STD-810F). Trigger release latches and molded-in hinges add to the security of the case. Three rubber over-molded cushion grip handles snap into vertical/horizontal position for convenient carrying options. A built-in automatic ambient pressure equalization valve (MIL-STD-648C) allows for safe air travel.