What are the bullet-shaped pieces in the sleeve pocket of Alpha jackets?Updated a day ago

Those "bullet-shaped" pieces on Alpha jackets aren’t bullets—they’re actually pen cap holders, a functional detail from military flight jacket design.

They were originally created to:
- Secure pens during flight so they wouldn’t fall out during turbulence
- Catch ink leaks, preventing damage to the jacket’s nylon shell
- Provide quick access to writing tools mid-mission