USGI will have part number and makers stamp on web of op-rod.
7267064 TRW, 7267064 HRA, 7267064 SA,
USGI SA op-rod will have part number followed by SA all on one line, SAI op-rod will have part number with SA below it(2 lines).
Chinese not marked at all.
PS 61188 is cage code for Winchester, 24411 is Mercury Tool & DIE.
A forum community dedicated to M14 and M1A Rifle owners and enthusiasts. Come join the discussion about optics, ammunition, gunsmithing, styles, reviews, accessories, Modern, Devine, SOCOM, EBR, classifieds, and more!