There are so many accessories out there lets just start a list of what you feel is practical and what is not. Lets post 1 practical item and 1 non practical item... I will start.
Practical - flashlight
Fun but Not practical - 90 rd drum mag
MWG 90 Rounder for the AR-15/M16 : Parts4ar15
Practical - flashlight
Fun but Not practical - 90 rd drum mag
MWG 90 Rounder for the AR-15/M16 : Parts4ar15