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W87

The W87 is an American thermonuclear missile warhead formerly deployed on the LGM-118A Peacekeeper ICBM. 50 MX missiles were built, each carrying up to 10 W87 warheads in multiple independently targetable reentry vehicles, and were deployed from... Wikipedia
Blast yield: 300 kt (W87-0); 475 kt (W87-1)
Detonation mechanism: Contact, airburst
In service: 1986–present
Mass: 400 to 600 pounds (180 to 270 kg)
No. built: 525
Produced: Mod 0: July 1986 to December 1988; Mod 1: 2030 onwards