[FroggyTheGremlim]

I thought MOP was a thermobaric like a daisy cutter.

[Mr. Lucky]

The Air Force seems to be pretty tight lipped as to how the explosive mixture works.

[CCGuy]

It is made to build up tremendous speed and then penetrate through many floors of reinforced concrete. It also has GPS guidance so this big monster can land within feet of an intended point.

I believe the public stats list penetration of:

200 ft of reinforced concrete
26 ft of high density reinforced concrete
or
130 ft of moderately hard rock

Over 20,000 pounds of this 30,000 pound munition is heavy steel made to withstand the impact and keep penetrating before detonating and a chosen depth or number of floors. The warhead itself is listed at 5,300 pounds.