Ah, I expect you work in army procurement.IIRC the C8 is the Canadian made version of "M16" and its ever so nice and definitely NOT cheap --- so the queue forms now as only expensive pieces of kit allowed.
C8A3 - £1165
SA80 A3 - £1700
Not including the millions we’ve spent developing and updating the SA80. Which is such a good rifle that no one else on the planet has bought it.