BSA Supersport head scratcher

[angrybear]

Ah that explains a lot, I have looked on Knibbs website and the Supersport is not shown with a cocking aid/moderator? Is it likely that this is a bitsa? Guess I’ll have to look for a cocking aid🤔 Thanks to members for replying so quickly.
P.s aah 🤦Averageplinker had a look at the link you sent me, now I get it👍

Well it might be a bitsa, but afaik that's a std BSA part fitted to the carbine's, as per my .25 in the pic.