What kind of rounds are these?

[zimm]

I found these in a drum mag. They looked linked and I'm thinking some kind of dummy rounds? Any ideas? It's from an AR.

 

[DubC-Hicks]

Those are the followers.

 

[zimm]

Oh! So they're part of the magazine? Never seen one before.

 

[Shadow9mm]

Theres different ways of doing it. From what i remember its more common in the double snail drum type.