GBU-57A/B Massive Ordnance Penetrator (MOP)

The GBU-57A/B Massive Ordnance Penetrator (MOP) is designed to destroy armored bunkers deep beneath the earth. It is seen as a potential weapon against nuclear facilities in Iran and North Korea that are mostly buried underground. The MOP can be carried by B-2 Spirit stealth bombers. The aircraft is capable of carrying up to two GBU-57s, one in each bay.

The weapon consists of a BLU-127 warhead; KMU-612 tailkit; BRU-72 bomb rack systems; MOP loading adapters; and MXU-1012/B...