Ian McCollum posted a video talk by Mike Burch, a manufacturer of US re-enactor uniforms and equipment on his Forgotten Weapons web site. Pretty informative and interesting.

http://www.forgottenweapons.com/us-uniforms-of-wwi-interesting-details/.

Personally I'm not a weapons collector or anything like that, but I still find some of Ian's topics neat and he nearly always has some great photos.

Enjoy!

All the best,
Dan