what are these

[Moe (fl)]

These three were found together. One is broken. Are they part of a magazine?

 

[duggap]

Those are the top off of ammo cartridges. They would usually hold six rounds.

 

[Retired Sarge]

Stripper Clip aka Cartridge Clip. Used for quick loading of a magazine or for quick loading of the rifle. No need to take single rounds and try to reload during a fire fight. The Clips come preloaded and are normally just dropped after loading. Here's some French 7.5 Stripper Clips.

Mike
TSgt, USAF Retired

 

[Charlie P. (NY)]

Good ID (without knowing any size or relative dimensions).

PS - Five rounds

 

[Moe (fl)]

Thank you all for the ID.