[Schoolboy]

Hey folks,
I'm curious if anyone else has attempted this previously.
I recently purchased two Boxes of MAGbrand Metal 190rnd M4/M16 magazines from ehobby. I'm looking to add weight to the magazines to weight roughly 15oz or round up to 16ox/1lb so simulate a loaded AR magazine.

This is purely for training purposes.

If you've previously done this, if you wouldn't mind sharing the modifications or weights purchased that would be a fantastic help.

Cheers!