The MR 41 is a French

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

-built thermonuclear warhead to be launched with the M1 and M2 missiles in Redoutable class ballistic missile submarines.

It has a yield of 500 kts and is boosted fission warhead based on highly enriched uranium combined with deuterium and tritium.

Entering service in 1972 it was withdrawn from service by the end of 1979, being replaced by TN 60

TN 60

The TN 60 was a French nuclear missile warhead.The 1 megaton TN 60 missile warhead entered service in early 1977 as an interim warhead for the MSBS M20 SLBM. The TN 60 was the first French warhead "hardened" to penetrate the Russian ABM defenses around Moscow...

 warheads.

See also

• force de frappe
  Force de frappe
  The Force de Frappe is the designation of what used to be a triad of air-, sea- and land-based nuclear weapons intended for dissuasion, and consequential deterrence...
  
  
• FOST
  Fošt
  Fošt is a settlement at the foothills of the Pohorje range to the west if Slovenska Bistrica municipality in northeastern Slovenia. The area is part of the traditional region of Lower Styria. It is now included with the rest of the Slovenska Bistrica municipality into the Podravje statistical...
  
  
• nuclear tests by France