AR-15 handguards come in many shapes and forms. There are so many options you can choose from. Quad rail, M-LOK, Keymod or no rail? Polymer or aluminum? Free floating or drop-in? With so many options out there, it can be difficult to choose the best handguard for your AR-15. The handguard will set the appearance and functionality of your weapon. It will also allow you to add more accessories to the rifle.