Call of Duty: Modern Warfare 4’s first beta weekend starts on August 21, and Activision has revealed all details you’ll need before going hands-on with the game. This information includes how to preload the beta, earn beta rewards, and make sure your PC meets all the security requirements and specifications to play. The first beta runs April 21-25, and it’s available for those who preorder the game on PS5, Xbox Series X|S, and PC.  The full MW4 beta dates and…