opinions on op rod

[MLD]

I have a 2.47 mil SA with a 12-43 bar. and a S-B10 bolt. Rec.heat lot # is A8. If it was yours,would you put a -6 or a -9 curved op rod on it? The best I can tell,it could be either. Thanks

[1563621]

curved 9
50000 - 2500000 Single slot, no valve/poppet. Unmarked.
SA Gas Cylinder Lock Screw(Plug) S B147428 Type 2 April/1943 to January/1944 1470000 - 2500000 Non-return valve, cross shaped slot. May show manufacture code. For use with M7 grenade launcher.
SA Hammer C46008-5 SA Type 2D June/1943 to August/1944 1630001 - 3100000 Drawing number on face, late hooks, no tooling hole.
SA Hammer Pin A13668 N/A January/1936 to December/1957 1 - 6100500
SA Hammer Spring B8887 N/A January/1936 to November/1957 1 - 6100500 20 coils
SA Hammer Spring Housing B8883 Type 2 July/1940 to December/1957 50001 - 6100500 45 degree slant cut at ends of safety slot
SA Hammer Spring Plunger B8880 Type 1 January/1936 to October/1945 1 - 3888081 1.542 inches long, "winged" head, 0.459 inches wide.
SA Handguard Clip N/A Type 3 August/1942 to December/1957 800001 - 6100500 Stamped steel, flat profile, no groove.
SA Handguard Ferrule N/A Type 2 June/1940 to December/1957 50001 - 6100500 Lip protruding .06 inches from rear barrel hole.
SA Handguard Liner B8893 Type 3 July/1940 to December/1957 50001 - 6100500 Unmarked. Front hole is .350 inches from edge, rear hole is .490 inches from edge. Notch is .70 inches wide by .15 inches deep.
SA Lower Band C46000 Type 3 June/1943 to December/1957 1650001 - 6100500 Stamped flat profile with no groove or scallops. Unmarked.
SA Lower Band Pin N/A Type 1 January/1936 to December/1951 1 - 3888999 Solid pin.
SA Operating Rod D35382 9 SA 6 December/1943 to January/1945 2250001 - 3450000 Straight bolt lug, no radius cut, curved side, marking on bottom
SA Operating Rod Catch Assembly C46027 Type 2 July/1942 to December/1957 700001 - 6100500 Unmarked. Right fork 0.10 in wide and Left fork 0.07 in wide, width at accelerator rivet 0.79 in.
SA Operating Rod Spring SA14675/B147658 N/A December/1940 to December/1957 160001 - 6100500 Round cross section.
SA Rear Hand Guard C46024 Type 2 March/1941 to D

[MLD]

Thanks,I appreciate the info.