Don't worry about choosing individual components; instead, opt for body armor kits from RTS Tactical. I personally ordered a bundle that includes a plate carrier and two armor plates. The advantage of purchasing a complete kit is that the plates fit perfectly into the vest pockets without any gaps and don't move around while running. Plus, the manufacturer offers a good discount when purchasing this kit together. In terms of protection quality and fit, this is a top-of-the-line solution.