I have a SA 1.5 million rifle too, also with the SA EMcF cartouche, barrel is SA 4-43. Some of the additional parts are:
bolt -12SA heat lot S04<>
op rod rev 6 SA
trigger housing -12SA, trigger guard milled
hammer -3SA, safety -9SA
Type 2 lock bar

Question on your SA EMcF stock, do you have the small crossed cannon stamp on the bottom of the pistol grip ? Also on the left side of your stock where the clip latch is inletted, is it a flat bottom or tapered ?