I tinkered today

[Grizzman]

I just pulled the ziplock bag out of the just drawer that's almost full of them.

I've got 6 different types.

Magpul ladder covers,
snap on covers of unknown origin (Magpul?)
LaRue index clips,
two different slide on type with locks, from the same manufacturer
some that are in 1/2 width sections that lock together

If you want to try them out, I'll fill a small flat rate box with them and send them to ya.