I run boron ceramide 4s. They'll stop .308 AP from 10 feet and withstand 10 rnds 1" apart and use a plate carrier with lvl 3 soft incorporated.

If the protection you're worried about is for lower extremities then sandbags on the floor and soft armor removed from old police type vests work great.

I have used this setup for over 7 years in Afghanistan and stopped me getting injured after taking direct fire from a PKM and several IEDs. I never had nor used up armor.

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"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course