This M4 is an amazing product. After running a Echo 1 G36C, I was really impressed at the trigger response that this gun had. The construction is very nice, and I actually prefer the plastic lower receiver due to the lower weight. It does help, overall, since the RIS rail can be quite heavy.
Speaking of the RIS rail, the gun is wired to the front, which can be quite annoying if your offside arm isn't as strong as you wish. The PEQ box that comes with this gun is plastic and is quite weak, it broke off during Operation Midnight Harvest III. A stronger PEQ box is recommended, or wiring the gun to the back and getting a crane stock.
This gun shoots at a decently high rate of fire, and shoots around 300 FPS. The back flip up sight is useful, and overall, this gun is great when it comes to performance. Even in longer ranges, this gun can touch people, and I highly recommend it.
Comes with reliable K120 Magazine
Great trigger response
VERY reliable overall (I banged this on a lot of objects while running).
Weak PEQ box
Crane stock's push button for adjustment fell off. (Might be user error.
Rating: [4 of 5 Stars!]