This ad seems to me to convey the myth that a machinegun is the ultimate weapon (you know those schoolboy debates as to which is the best weapon).
Here we have the cowboy protecting his ranch from the evil desperados and wiping them out with his trusty Thompson.
Nevermind the muzzleclimb.
But this is advertising and it wants to sell you things. It plays on your fear--evil desperados. But you can deal with them if you buy our product.