Can Anyone Identify These FN Dust Covers?

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

https://www.milsurps.com/images/impo...PB281157-1.jpg
https://www.milsurps.com/images/impo...PB281159-1.jpg
https://www.milsurps.com/images/impo...PB281160-1.jpg
https://www.milsurps.com/images/impo...PB281161-1.jpg
https://www.milsurps.com/images/impo...PB281162-1.jpg

Israeli FN FAL with Rail on top cover.https://www.milsurps.com/images/impo...PB241139-1.jpg

Commonwealth FNshttps://www.milsurps.com/images/impo...PB241140-1.jpg

L1 A1s Rebuilt to Canadian C1 & C2https://www.milsurps.com/images/impo...PB241141-1.jpg

The Front Sight protector is a British Service issue. It was used ONLY for Parade & Rifle drill use. It's purpose was to prevent the weapon snagging on any of the uniform at the Foresight protector. Or gas plug areas.
I have seen these advertised by a well known company for sale in the US. As, 'Brush Protector's'. This is TOTALY incorrect, the above statment is the correct one.
Common sense would dictate, that if you tried to aim the Rifle with the protector fitted, you would NOT be able to take a proper aim as the sight is then obscured!

The rails were for night vision sights. (night scope) like the AN PVS 502(I think)?? It's been a while. The normalish short body cover was an early one from a trials type rifles. As Tanky states the foresight cover is just that. We didn't use them in the field at all.

The largest cover/mount is for the PAS4 IR scope. It's the 2nd from left scope in my photo. I put it on backwards for the photo:confused:, but you get the idea.

The other ones, I don't know, they aren't the normal cover for the PVS502. That cover is the 3rd from left in my photo. Maybe the ones in your photo are some sort of prototype or unit made cover???
https://www.milsurps.com/

I don't know what happened to the photos of the covers and optics, I put in the last post? This site does some strange things sometimes....

Dust Covers.

Aluminum one is Belgium M1 FAL cover it should have grey paint on it.

The two C1 covers with mounts, I'm unsure about the rail its too small for a NV sight. Maybe its for a lightweight optic? Maybe it could of been a Gunsmithing mod for when the rifles were readily available for sale in Canada? (I would love to buy one if you ever decide to sell).

The large sheet metal mount is as Koldt said a PAS4 IR mount.
https://www.milsurps.com/images/impo...RsightSM-1.jpg

Try this again.

Apparently I can't figure out how to post photos. It works on every other site, just don't know how to do it here...

http://www3.telus.net/hansonk/fn covers.jpg/