Hey all, I recently purchased some left over HARDOX450 AR plate in 5/16" thick and laser cut targets from them. Although it is not 500 hardness, I doubt you will notice much of a difference. I have shot 3/16" thick 450 from 50 yards with an AR-15 and it will only pit it slightly. I have several sizes to chose from and will trade for .45ACP ammo or 5.56 ammo. Prices are pretty much my cost rounded up a buck or two. 18" square $60 16" round $45 8" round $15 6" round $10 4" round $5 Located in Springfield/Eugene area. I can also make these in any size and thickness you would like.