What size steel for a bullet proof room? - Survivalist Forum
· Look in the yellow pages for steel fabrication shops, suppliers, scrapyards, etc. and ask if they have any AR500 or AR400 steel plate. 3/8" thick will stop pretty much anything short of armor-piercing rifle rounds, including .308, .30-06 and 7.62x54R I have been down this road before. It will run you $900-$1,200 for a 4x8 sheet of the stuff.