nose cap

noun3

1. •
   The protective covering on the end of an aircraft fuselage.
2. •
   The nose cone of a missile or shell, often containing explosives or a timer.

   • This was a shrapnel shell used by the Austrians in the mountains with a nose-cap which went on after the burst and exploded on contact. — 1929
3. •
   (historical) A protective cap on the end of a gunstock.