I would love to add more original parts to this rifle, ie: stock, scope, and base,, but as they became popular, it became a rich man's game. I do owe a big thank you to 1st usmchistorian for "daring me" to build it, and then usmcsgt0331 for all the info and photos he so freely shared on another forum.
I'm glad I could help you with information and photos for your build! I have no idea how many people have seen the M40 pics/info I've posted, but I've personally helped a few hundred people with their M40 and Mk13 builds. I really enjoy talking to other people who are interested in these same rifles! Let me know if you need any other photos or information from me on any future builds, I'd be happy to help!
Your comment about the M40's growing popularity reminded me of something that I've been told by quite a few people. Apparently I'm the reason why the M40 market blew up about 7 years ago and why the M40 prices skyrocketed. It seems kind of ridiculous, but it sort of makes sense after talking it through with some friends.
Since the common M40 reference books (Chandler, Senich, etc.) have grainy black and white photos, not too many people knew what things like the Redfield greenie scopes actually looked like. In fact, the whole reason why I started posting these detailed photos is because I couldn't find anything even remotely close to a good photograph of any real M40 parts!
My photographs were the very first high definition, full color photos to be shown publicly and posted on the internet. There were a few really color photos of greenies on the internet, but they were pretty low quality, I provided something better. So, I began filling in the major gaps in the collective M40 knowledge base with amazing photographs and new information that hadn't been published before.
Apparently the new pics and info educated thousands of collectors/historians/enthusiasts/veterans/etc. that saw my posts online. With this increase in knowledge come a massive boost in everyone's confidence to correctly identify real M40 parts, which led to people confidently spending higher amounts of money for genuine M40 parts. I think that the M40 market would have gotten to this point eventually, but apparently there was a catalyst that kicked it off sooner (me).
The funny thing is, I've also had people tell me that I also kicked off the Mk13 market because I had to find a way to sell most of the 155 original Mk13 Mod 0 stocks I had. Many collectors were familiar with the Mk13 Mod 5, but almost no one I talked to had ever heard of the Mod 0. So, it was actually quite difficult to convince collectors to buy an original SEAL used stock kit to a rifle that they had never heard of! It might seem ridiculous now, but 6 years ago in 2016 this is literally what I was faced with. It's a pretty interesting story I have about selling those stocks, but this is an M40 thread and I've already derailed it enough.
Here's some more M40 stuff to get this thread back on track:
The list I have doesn't show 168,333. I know that doesn't mean much tho as prolly none of the lists are 110% accurate. I'd love to own that stock..

List does show the following:
168,179
168,346 this rifle specifically mentioned/pictured and caption reads Remington Arms Co. photo, May 1966 and it sported a gloss black accurange scope.
168,820
168,889
169,063
You are correct the list is incomplete, but I've found numerous M40 stocks and 40X bases that add additional M40's to Chandler's serial number list in DFA volume 1. The serial number on this stock is extremely close to M40 168346. That doesn't mean too much, but it's interesting that they're close. I also purchased this stock from Norm Chandler many years ago, so I know it's authentic.
I know you like this stock, but I actually have it paired up with a complete set of original M40 parts (scope, base, rings, barrel), so unfortunately it can't be separated. All this kit needs is a donor rifle in the correct serial number range and it's ready to be assembled into an M40 clone (the receiver, bolt and trigger being the only civilian parts). I had close to a dozen each of the vintage M40 parts listed above, so it just made sense to me to organize them into nice vintage USMC used M40 kits.
I've actually been selling and giving away some of the stuff in my M40 collection. In the past few months I've sold 3 complete M40 kits to collectors, they just need to be put together. I think I have about a half dozen more of these complete M40 parts kits, all they need is a donor rifle for the receiver, bolt and trigger.
Here's the most recent M40 kit I sold. Pretty bad photographs, but it's an amazing kit and I'm pretty sad to see it go. The scope and base are only 1 digit off from each other, so close to a match! I've actually had that happen a few times with these kits, lol. The stock isn't too far off from the scope and base too.