https://www.astrotx.com/M-16A1%20Rifle.pdf
Keep your own rifle clean and lubed properly.
Make sure your teammates’ rifles are kept that way, as well.
This is not a drill.
Supplemental from the modern era; recommended:
Bracken Sends
Western Rifle Shooters Association
Live not by lies.
https://www.astrotx.com/M-16A1%20Rifle.pdf
Keep your own rifle clean and lubed properly.
Make sure your teammates’ rifles are kept that way, as well.
This is not a drill.
Supplemental from the modern era; recommended: