The ICS M4 RIS Complete Upper Receiver comes with everything you need to instantly change your M4. Just pop the front and rear pin out of your gun and throw this baby on and you'll have a railed M4 upper receiver. This kit comes complete with the upper receiver, R.I.S., 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.
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