I've had this M4 for about 7 months now. First impression out of the box was extremely good. The receiver is done in a nice flat matte black and the RIS is rock solid, absolutely no wobble. Stock is also very solid and retracts smoothly clicking into each hole on the buffer tube. On the flip up front sight you have to throw the small lever on top to unlock it, then throw it back to lock it again in the up position. Trademarks and logos are engraved and not on the surface of the receiver. As far as the performance goes the ROF was very fast. I stress tested it using three 450rd hi-caps in about 5 mins with no problems. The motor grip got a little warm but not hot and in the seven months I've had the weapon I have fired many many more rounds through it. Still running strong with no problems. I don't have a chrono so I can't give exact FPS but its pretty close if not right on the dot with what ASGI says it shoots. Using .20g bb's it is very accurate to about 75ft but will reach at least 100ft just less accurate. All in all I give this M4 five stars for its nicely done finish and the damage it does in the field. I would recommend it to anyone looking for a good M4.
Good ROF and FPS
The mag that came with mine was crap. It doesn't lock in the mag well very good and will misfire every time unless you hold the bottom and apply upward pressure. MAG brand mags are the best I've found.
Motor grip screws wiggle a little loose every now and then. Easy fix though.
Battery space in the stock is very cramped. Be very careful when inserting the battery to make sure the wires are not damaged.
Rating: [5 of 5 Stars!]