Thanks for all your help guys, it went with an almighty crack (my hands and the rifle 🤣)
Alas it was all in vein as the Nurpol Bocca tracer unit is 2mm too big in diameter to fit in the handguard 😥
Had to just stick a Lighter 5 unit on it instead
I recently bought a Arthurian Offspring Crimson and trying to fit a Nurpol Tracer unit but in order to remove the flash hide I need to remove the hand guard, Ony ideas how it's done?