The ICS M4 S-System Commando Complete Upper Receiver comes with everything you need to instantly change your M4. Just pop the font and rear pin out of your gun and throw this baby on and you'll have a railed M4 S-System Commando. This kit comes complete with the upper receiver, R.I.S., gas block, front and rear sights, and complete upper gearbox. There is no sense in buying another gun when you can change your existing one within a few seconds.
Package Includes: Entire upper receiver and front assembly.