If you have been looking for an ICS CXP AEG that comes with the M-Lok System, then the ICS CXP-MMR Carbine that is in stock at Fox Airsoft should be on top of your list... "ICS makes proline M4s that give the other brands a run for their money. In fact, these are a personal favorite of ours at Fox Airsoft for several reasons. These are built very well, have a stout gearbox, and are very easy to work on. We'll go into why in this video."