A factory .22 Patt 14 No. 2 conversion can go either way, original to the rifle parts or a mix-master, they did not care as they just wanted the rifle serviceable. Yours has been rebarrelled in 1927 so if you have a solid barrel now it is a Short .22 Mk IV* or Rifle No. 2 Mk IV* rather than a .22 Patt 14 No. 2. Since it was rebarrelled by NZany combination of parts will work as they would of replaced any non-serviceable parts at that time.
My example is a 1915 LSA with a matching non-volley sight forend and a few Aussie parts that got added during her life.