The whole Tuffpak case locks. For putting in the bottom of a duffel, you use an aluminum case which is seperately locked. Both systems meet requirements.

I'd note that a double rifle or two in an aluminum case in you duffle plus you cloths is going to weigh a ton.

Edit: Just wanted to point out that the FIRST RULE of traveling with good guns of any description is to insure them for their replacement value!!!

JPK