I also read somewhere that it could withstand a drop to the Lunar surface from 50 feet if the crew had run out of fuel.

I'm thinking out loud here.

Lunar gravity is 1.625 meters per second squared. That's 5.331 feet per second squared (damn the Imperial measurement system!).

The LM legs were designed to withstand a maximum of 10 feet per second with zero lateral velocity.

Lets assume a zero vertical speed at the point of engine cut-off. A fall from 50 feet would then give a vertical speed at impact of 23.09 feet per second, after a 4.3 second free-fall, which is over double what the leg structure was designed to withstand.

In Lunar gravity, a 10 feet per second velocity would result after just under 2 seconds of free-fall from a height of 9.4 feet.

So, no, the LM would not survive intact a fall from 50 feet.