Information about l96a1

Hello, I'm french an collect english rifle. I find a L96a1 but I dont find enough info about this rifle. I understood that there is many variants of this rifle but I don't understand the difference beetween. I see that some have muzzle brake ou not. Some have inscription struk on the bolt box and some have hollow machine for inscription.

https://www.milsurps.com/images/impo...20180126-1.jpg
https://www.milsurps.com/images/impo...20180127-1.jpg
https://www.milsurps.com/images/impo...20180128-1.jpg
https://www.milsurps.com/images/impo.../l96a110-1.jpg

More over I have juste rifle and bi pod. Is there somebody who would say me where I can foud scope, mount and iron sight?

Excuse my english and thanks for information