2023年10月31日 · WASHINGTON — Lockheed Martin has been awarded nearly $1 billion to develop a new reentry vehicle for the LGM-35A Sentinel intercontinental ballistic missile (ICBM), the Pentagon announced Monday...

The Mark 21 nuclear bomb was a United States thermonuclear gravity bomb first produced in 1955. It was based on the TX 21 "Shrimp" prototype that had been detonated during the Castle Bravo test in March 1954.

The W87 is an American thermonuclear missile warhead formerly deployed on the LGM-118A Peacekeeper ("MX") ICBM. 50 MX missiles were built, each carrying up to 10 W87 warheads in multiple independently targetable reentry vehicles (MIRV), and were deployed from 1986 to 2005.

2024年6月18日 · After attaining full operational capability, the Mk21A RV will be integrated on the nation’s intercontinental ballistic missile weapon system. The Mk21A program is currently in early development and overseen by the Air Force Nuclear Weapons Center.

The Mk-21 reentry vehicle (RV) used with the W87 warhead was previously known as the ABRV, Advanced Ballistic Reentry Vehicle, designed by AVCO Systems Division. This RV affords the warhead greater accuracy.

The MSR initially won the PSR competition, and was called the Remington Mk 21 Precision Sniper Rifle in U.S. military service. [3] [4] However, it was then decided that the Mk 21 did not conform to SOCOM requirements at the time in 2018, and the program was re-competed with the Barrett MRAD selected in 2019 as the Mk 22 Advanced Sniper Rifle ...

2024年6月19日 · It will carry the future ICBM payload — the W87-1 nuclear warhead, an upgrade on the W87 carried by the operational Minuteman III ICBM Mk 21 reentry vehicle. Work is being performed in Pennsylvania and is expected to be completed by October 2026.

2019年10月17日 · The Air Force has awarded Lockheed Martin a $108 million contract for the Mk21A reentry vehicle -- a platform that's intended to deliver the W87-1 warhead from the Ground Based Strategic Deterrent system.

The Mark 21 free-fall nuclear bomb was adopted in service in 1955. It was developed on the basis of the prototype TX-21 "Shrimp", which was tested in March 1954 (the Castle Bravo test).

2001年9月1日 · Mk-21 RV formerly known as the ABRV (Advanced Ballistic Reentry Vehicle) developed by AVCO Systems Division. Heavier, but higher accuracy and lower cost than the Mk-12A. Tests of the Mk-21's hardness to nuclear effects were conducted in 1984-86: