I have never seen the 67 green version before ever for sale/never seen it in person or picture until now. I'd imagine it's rare or at the very least hard to find. 

On 2025/7/3 at 午後10時2分, LE LOUP DES MERS said:

67年式のグリーンバージョンが売られているのを今まで見たことがありません。実物も写真も見たことがありません。おそらく希少品、あるいは少なくとも入手困難なものだと思います。 

I bought it on eBay

I'm not the one posting it, but you can read the green one

 

https://www.au104.org/Memorabilia/Mem-27.html

It's interesting: new buffer, birdcage hider, round handguard, no LSA small bottle(2oz), etc

There is no Vietnamese version either

I don't have it, so I want it

 

This one also has a round handguard

 

XM148 also appears

 

https://www.reddit.com/r/RetroAR/comments/1b3mi6j/remember_the_m16a1_comic_book_on_how_to_maintain/