蝴蝶雷，如BLU-43B Dragontooth（龙牙），是一种美国在越战时期使用的由飞机大面积布撒的微型反步兵杀伤地雷，用于阻断越军的交通运输。蝴蝶雷其外形独特，成本低廉，内部的爆炸物装填量很小，所以通常只会炸残触发者的脚部而不致命。同时其压力触发的引信十分灵敏，而且一旦解除保险就无法恢复到保险状态，加上撒布数量大，扫除困难，所以对平民的威胁也很大。这种地雷被越方缴获以后，苏联人仿制了自己的PFM-1型地雷，由于其外形而得了“蝴蝶雷”的外号。

Butterfly mines, such as the BLU-43B Dragontooth, are miniature anti-infantry mines used by the United States during the Vietnam War to block the transportation of Vietnamese troops. Butterfly Mines are unique in shape, inexpensive, and have a small amount of explosives inside, so they usually only blow up the trigger's foot without being fatal. At the same time, the pressure-triggered fuse is very sensitive, and once the insurance is lifted, it cannot be restored to the insurance state, and the large number of spreads makes it difficult to sweep, so the threat to civilians is also great. After this mine was captured by the Vietnamese side, the Soviets copied their own PFM-1 mine, which was nicknamed "butterfly mine" because of its appearance.