[Random Guy]

I don't know anyone with first-hand combat experience who used the AR TEL scope in Vietnam, only some veterans who used the later ART II scopes during the 1980s.
I did write-up some online history re military M14 optics, and of course the AR TEL and ART II were both included:

https://m14forum.com/optics/474454-...military-m14-daytime-sniper-rifle-scopes.html

Thanks for producing the videos, they were well-done.