The planned Swedish bombs intended to utilize Pu-239 as the fissile material. When the early drafts (circa 1955) were replaced by the more concrete estimates a proposed design, one of the first drafts was a bomb weighing 400–500 kg and 35 cm in diameter. A bomb of those dimensions could have been carried by the A 32 Lansen. A study conducted by the nuclear explosive group in 1961-1962 outlined a plan to acquire 100 tactical nuclear bombs with approximate yields of 20 kt.
