For anybody else wondering about this old thread, the old part numbers don't seem to be available any longer so I am going to order this one and five it a go on my Sar K2
https://www.novaksights.com/Detail.aspx?PROD=1100513I am going to drill my front sight and install a rod in that and should be good to go. FWIW my old Sar K2 has a broken rear sight and needs replacement.
Happy shooting!