What makes an L1A4 an A4?

[tankhunter]

Mike, all seen & understood.

Ill boil it down even further..............If you look at a unmolested KNOWN direct from the factory L1A3 with the grips so marked. it WILL have a waisted crossguard. IE: L1A3
And then look at an unmolested KNOWN direct from the factory, marked on the grips L1A4. You will notice it WILL have a parallel crossguard. IE: L1A4
That is EXACTLY how they left their respective Factories (Unless Modified from an earlier mark to A3 Spec)

I cannot differentiate any clearer or indeed easier between the These TWO variants!

Im leaving now, before I hang myself in the Toilets!........