I dont know if the Axis lock is really capable of withstanding 5000lbs of pressure or not, this was a US Cavalry ad, not Benchmade.
I do know that the Axis lock is one of the best and strongest locking systems ever developed.
I believe McHenry and Williams invented this design. Benchmade promptly saw the genius and marketability of the design and bought the patent rights.
Axis locks stay tight and wobble free for years. Ive had other designs that got loose in a matter of days. Some of them you couldnt tighten either. Axis locks are adjustable if they do develop play and you can disassemble them easily.
Ive tried about every other decent locking system out there and nothing beats the Axis design. Some framelocks are strong, but you cant CLOSE THEM easily, quickly or safely ONE HANDED. To those who argue that this isnt important, or even handy, I ask you one question. Would you buy a knife that has a nail notch instead of a thumbstud? Of course not! Quick one-handed opening is important, safe and fun. So is closing a knife one handed.
In the sad world we live in that is full of sheeple, it sometimes is prudent to be able to whip out ones knife, slice whatever it is that needs severed, and shove your knife back in your pocket as quickly as possible to avoid spreading panic amongst the tender populace.
I can do this with an Axis in about 3 seconds flat. With one hand.