I often travel with firearms, and even when I don't "need" to I will sometimes put an AR-15 lower receiver in a large Pelican case so I can securely lock it. A

I often travel with firearms, and even when I don't "need" to I will sometimes put an AR-15 lower receiver in a large Pelican case so I can securely lock it. A stripped lower can be had for $30 if you shop around, and I've met others why travel with sensitive electronics that have done the same thing.