Bunker Busters date back to the 1940s when the Germans (August Cönders) tested their first shell on a Belgium forte in the opening days of World War II. Following Cönders innovation, almost every army invested in bunker busting technology. Below is a quick hit list of Bunker Buster missle eye candy.
GBU-28 Deep Throat
Designed in 1991 (still in service), the Guided Bomb Unit 28 (GBU-28) is a 5,000-pound (2,268 kg) laser-guided “bunker busting” bomb nicknamed “Deep Throat”. The operator illuminates a target with a laser designator and the munition guides itself to the spot of laser light reflected from the target. It proved capable of penetrating over 30 meters (100 ft) of earth or 6 meters (20 ft) of solid concrete. It was designed, manufactured, and deployed in less than three weeks due to an urgent need during Operation Desert Storm to penetrate hardened Iraqi command centers located deep underground. Source
The BLU-109/B has a steel casing about 1 inch (25.4 mm) thick, filled with 530 lb (240 kg) of Tritonal. It has a delayed-action tail-fuze meaning it waits until it’s deep inside the bunker before it detonates as illustrated in the video above. It can penetrate up to 6 ft (1.8m) of reinforced concrete and is not likely to be retired anytime soon due to the massive blast capable from its warhead. Source
The Grand Slam / Earthquake Bomb
Designed in 1943, The Grand Slam was a 22,000 lb (10,000 kg) earthquake bomb used by RAF Bomber Command against strategic targets during the Second World War. It would reach near-supersonic speed, approaching 715 mph (1150 km/h). When it hit, it would penetrate deep underground before detonating. The resulting explosion could cause the formation of a camouflet (cavern) and shift the ground to undermine a target’s foundation. Source
The GBU-39 Small Diameter Bomb (SDB)
The SDB is a 110-kilogram (250 lb) precision-guided glide bomb that is intended to provide aircraft with the ability to carry a higher number of bombs. It entered production in January 2014 and will add a tri-mode seeker (radar, infrared, and semiactive laser) to it’s navigation technology. Capable of penetrating up to a meter of steel reinforced concrete, the GBU costs around $100,000 per payload.
Israel developed an improved precision, bunker-burrowing weapon which Israeli Military Industries (IMI). The 500-pound MPR-500 is a laser-guided bomb that can penetrate double-reinforced concrete walls or floors without breaking apart. The bomb was shown in action penetrating four reinforced concrete walls with fragmentation from the explosion limited to a radius of less than three meters. Source