The is a transport case for two golf bags.
It has been adapted to hold 4 rifles.
The case alone is $300-$400.
I found one used on ebay for $300.
It is airline approved (at least for golf bags).
No keys for the little locks.
This would be over-size and over-weight for an airplane.
But you could bring all your clubs.
48" L X 15.
5W X 11.
75D
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rifle, pistol, pistal, gun, bb, BB, carry, holster, shoot, shooting, target.