Yep you are certainly not wrong, i'm building a functioning, but deac one up, just for display purposes, (which i'm actually having an absolute ball building and researching, great project) and have gotten EVERY single part, about 46/48, bar a receiver and barrel off ebay. Incredible isn't it? The last part i got was a complete bolt, with the extractor gear/firing pin, the lot, that the seller had listed as 'm1 garand parts group', then just the part number and a picture of the SA marking, with the words 'sold as is, complete' you couldnt even tell it was a bolt, just a piece of metal with a part number on it. Luckily i knew what it was by that particular number and proceeded to purchase it
Handy for me - yes, i'll admit, but also a little too handy for people up to no good. I've even seen pistol grips taken off for not having 'correct' wording.