Mark 81 bomb

Mark 81 General Purpose (GP) Bomb
Crewmen upload three Mark 81 general purpose high explosive bombs, with Mark 14 TRD (Tail Retarding Device) attached, aboard an A-4F Skyhawk aircraft from Marine Attack Squadron 133 (VMA-133).
Type	Low-drag general purpose bomb
Place of origin	United States
Specifications
Weight	262 lb (119 kg)
Length	74 in (1880 mm)
Diameter	9 in (229 mm)
Filling	Tritonal, Minol or Composition H6
Filling weight	96 lb (44 kg)

The Mark 81 (Mk 81) 250 lb (113 kg) general purpose bomb (nicknamed "Firecracker") is the smallest of the Mark 80 series of low-drag general-purpose bombs.

Developed for United States military forces in the 1950s, it was first used during the Vietnam War. The bomb consists of a cast steel case with 96 lb (44 kg) of Composition H6, Minol or Tritonal explosive. The power of the Mk 81 was found to be inadequate for U.S. military tactical use, and it was quickly discontinued, although license-built copies or duplicates of this weapon remain in service with various other nations.

Development of a precision guided variant of the Mk 81 bomb (GBU-29) was started due to its potential to reduce collateral damage compared to larger bombs, but this program has now been cancelled in favor of the Small Diameter Bomb.