I got around to partially disassembling my Garand today. So far the rifle seems to be all Springfield. According to the drawing numbers the SA marked op-rod dates from early 1942. I guess both Springfield and Winchester made a grooved metal clip on the top hand guard, so I'm not sure about that one. According to the book they stopped using those in early 1942. The trigger assembly is either very late war, or post war Springfield. I didn't measure the cloverleaf to be sure which, but it is also stamped SA. The number/arrangement of diamonds/square, on the buttplate indicate Springfield. The stock is a Springfield USGI replacement stock. The receiver drawing number matched the serial number. Some day I'd like to have an original WWII Garand, but this one at least has some WWII parts (receiver, bolt, op-rod, top handguard/grooved clip, and possibly the USGI replacement stock). Didn't check the gas tube, so I'm not sure about that one. Also didn't check the smaller parts. Pretty fun doing the "investigative" work.