C&Rsenal. Maybe you already know about this?

[Londonshooter]

A buddy put me on to this you-tube channel after a discussion about my Mannlicher-Schonauer. I'm more of a sporting guns guy but think a lot of you here will appreciate the quality of the videos presented by this fellow. Really nicely done and well-researched background/history with exploded diagrams and period photos for a lot of WW1 small arms.
https://www.youtube.com/channel/UClq1dvO44aNovUUy0SiSDOQ/videos
Hope you enjoy,
Lond.

 

[Horilka]

They also have a site with nice references and Q&D guides. http://candrsenal.com/

 

[TheNewfieBullet]

They also make very good posters.
I'm extremely happy with their most recent service rifles of WW1 poster.