Just bought my first AR, a M&P 15 sport. Will be picking up monday. I want to change the handguards and want to order right away but want to make sure I order the right ones as there are so many out there it gets confusing. Want direct replacements without effecting front sight. Thinking either Magpul moe or a quadrail. Can.u give.me my best options,same length as stock,not affecting front sight. Brand,model# and where to get. Forgive my long rant just excited to get my first rifle