NOTE: Remember that the length of your selected handguard needs to be at least 0.7" shorter than the length of your selected barrel in order for your muzzle device to have clearance. This is especially important if you plan to mount a suppressor on top of your chosen muzzle device.
I.E. If you are purchasing a 14.5" handguard to go with a 14.5" barrel, you will have interference, so purchase a 13.7" one instead.