The BLG 66 Belouga grenade launcher bomb is an anti-runway cluster bomb designed by the French company Matra and entered service in 1979.

Weighing 305 kg , it has a cylindrical shape and measures 3.33 meters long with a diameter of 36 centimeters, 55 cm including the tail fin . It carries 151 multipurpose submunitions with a unit mass of 1.3 kg and a caliber of 66 mm (hence its name) of three categories with a total mass of 195 kg :

• Type AC anti-tank, effective against armored vehicles
• Type EG, fragmentation grenade against vehicles, equipment, and in an anti-personnel role, lethal range estimated at 60 m .
• Type IZ area interdiction, aimed at destroying road surfaces, therefore against airfields and road junctions and capable of exploding several hours after being dropped.

After release, the attachment plate is ejected with a delay, then a parachute is deployed to slow the munition. The submunitions are then ejected in successive rings, with the pilot having the option (beforehand in the cockpit) to choose the length of the hit zone: either a zone 240 meters long by 40 meters wide of 10,000 m² or a zone 120 m by ^{120 m} of 5,000 m² .

It can be carried by the majority of French Air Force combat aircraft , including the SEPECAT Jaguar, the Mirage F1 CT and the Mirage 2000 , which is capable of carrying four of these bombs.