Can Anyone Identify These FN Dust Covers?

[Albayo]

Gentlemen I need some help with these FN parts.
Here are a few dust covers I think are for the FN C1 rifle.
I have identified the grenade sight, front sight protector, but am not farmiliar with the action covers, with the rails.
Two have a solid one piece steel base on top 3 1/2" long and 1/2" wide. Second last picture is very high for a night scope, for the C1. The last picture shows an aluminum Cover.
I have one Israeli FN FAL with a long dust cover with a similar rail but a couple of inches longer.
Can anyone identify what was attached to the covers with the rail?
I can't find any information on the aluminum cover. Any help would be appreciated.
Thanks
Al







Israeli FN FAL with Rail on top cover.

Commonwealth FNs

L1 A1s Rebuilt to Canadian C1 & C2

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