Yeah, I know it seems a daft question but there's a reason for it.

Over on facebook on the International Bayonet Association page this page if anyone is on Facebook I'm having a bit of a discussion regarding the difference between an A3 and an A4 with an ex REME Armourer (I think) and we seem to be disagreeing what makes an A4 an A4.

So, what I'm saying is an A4 is one of the later bayonets from the '70s onwards, made by Hopkinson with the riveted pommels etc and what he is saying as far as he an the military are concerned an A4 is any L1 type bayonet with the straight crossguard and the pommel has no bearing on tjhe designation regardless of whether it's riveted or brazed on and there is also no such thing as a short fullered A3 with the straight crossguard it's an A4, even if it's a 1966 dated Enfield it's still an A4?

I know there are a few ex military armorers and the top man himself (Peter Laidlericon!!) on here so what is the military view point on what makes an A3 and an A4. Do I as a collector, and a load of authors and others need to alter their viewpoint on what is an A4 now?

The three below are a 1960 dated, Enfield made long fuller and waisted crossguard, a 1975 dated, Hopkinson made, straight crossguard, riveted pommel and finally a 1966 dated Enfield, short fuller and straight crossguard.
I would make these as L1A3 with long fullers, L1A4 and finally an L1A3 with short fullers whilst the other chap makes these to be an L1A3 and two L1A4's.

So, what are they??
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