I am getting the Colt LE9620, but have a few questions. I want to replace the handguard with a railguard, get a scope, get a verticle grip, and get a Surefire flashlight and mount. Who makes the scope that has a chevron that compensates for .223 trajectory? Also, what brand 4-rail handguard and verticle grip do you recommend? Which Surefire flashlight is best for my rifle and what mount will I need for the light? What is the best combination that I can get for $300, $350? Please give links to any website pages selling the items that you recommend. Thank you.