CATI is good to go. The higher hardness armor is good at stopping higher velocity M193. It's more brittle though, so if you pack a ton of energy on the plate (close proximity .308" very close to each other), then the steel can actually crack.
There's also this which from reading is some newer steel offering from Sweden that's specifically designed as armored steel. Other companies sell it as well:
There's also this which from reading is some newer steel offering from Sweden that's specifically designed as armored steel. Other companies sell it as well:
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