
https://www.americanpartisan.org/2021/01/the-anti-materiel-rifle-amr-part-i-by-mike/

See also:

https://www.ballisticmag.com/2020/05/26/safety-harbor-shtf-50-upper/
Western Rifle Shooters Association
Once your society has been captured by the evil and the insane, nothing remains save for submission or battle.