Ship, store, and rack up to eight M4 or M16 rifles in the 472-M4-M16-8 Rifle Case from Pelican. Constructed of sturdy rotomolded polyethylene, the 122-pound wheeled case excludes moisture with a silicone sponge O-ring seal. A pressure relief valve permits air travel by adjusting to different air densities, and a humidity indicator alerts you if you need to perform preventive maintenance. With its lid off, the case can serve as a lockable gun rack.