Dalua,
I understand your theory.... very adroit. The status of moderators is ambivalent, and the earlier posts reflect a lot of frustration with this. I've had no direct experience of this, as I don't (& won't) use mods at all although the nice FLD staff licensed this ages ago.
However, harmless lump of metal or not, legally they've acquired most of the characteristics of 'firearms'. You can for instance trade in an unused moderator slot for a firearm as a free Variation without increasing the number of firearms held........ although in practice you have acquired an extra one.
That's another logical conundrum to ponder.
I don't think it's a conundrum at all, really. It certainly (but thanks for the compliment) is not that adroit. It is simply the only understanding of the law which does not leave owners of moderators for all airguns and firearms entirely at sea with respect to what is and isn't a S1 item.
To me, the only interpretation of the term 'accessory to', as used with respect to moderators in the Firearms Act, which seems to make consitent sense is that the term has a similar meaning as 'accessory to' a robbery, for example: as opposed to interpreting it to mean the same as the colloquial 'accessory for'.
In order for someone to be an 'accessory to' a particular robbery, a bloke must have a specific relationship to that robbery. It is not reasonable to arrest some bloke
as an accessory to a robbery just because as a bloke he could, given the chance,
have been an accessory to a robbery.
So, perhaps with a moderator: pretty much any moderator is designed or adapted to the purpose could be used as an accessory to (i.e. attached to) a S1 firearm - airgun mods are designed to cope with S1 airguns if not even rimfire rifles and shotgun mods are designed to cope with S1 shotguns, just as any bloke has the potential to be an accessory to a robbery. However, without the specific association of the mod to the S1 firearm or the bloke to the robbery, I can't see how either one could be an accessory to the other.
The important difference seems to me to be that having been an accessory to a robbery, a bloke retains the guilt of that criminal act - such that once he has broken off his criminal activity or association he can't plead not guilty on the grounds that he isn't doing it any more.
A moderator is not a bloke, and it therefore seems likely thay it should not retain the restriction to which it was subject when it
was an accessory to (i.e. attached to) a S1 firearm once
it ceases to be an accessory to (i.e. is removed from) a S1 firearm.
My opinion is that the 'slot' for a moderator on a FAC is filled when the mod is attached and vacated when the mod is removed. The bit about moderators was introduced into the (I think) 1934 Firearms Act, and the 'slot' system already established simply had to cope with it somehow, as it has done for 80-odd years.
why arnt muzzle brakes on ticket basically its a screw on extra which reduces recoil,just like a mod useless and fit for nothing unless fitted on a rifle
'cos they aren't 'designed or adapted to diminish the noise or flash', I think. A detachable flash-hider would, as far as I can tell, require a 'slot'.