Things I liked: The gun is almost completely composed of metal, giving the gun a very sturdy feeling. The receiver is metal on the upper level while the lower part of the receiver is plastic. Of course, the best feature of the gun is the blowback. The slide is composed of metal along with body of the gun, giving the blowback a nice metallic, "cling" noise. This gives the gun an even more realistic tone, sounding like an authentic silenced MP5. This gun shoots hard at around 380 to 400 fps, and the gun weighs in about 7 to 8 pounds. Overall, this gun really impresses me on Echo1's craftsmanship. The metal parts follow: Gears, gearbox, bushings, silencer, charging handle, clip, body (Excluding lower receiver, grip, J-stock, battery compartment), sights, and the list goes on.
Things I would have changed: The slide catch for the stock is plastic, and the J-stock stopped locking within the first week. I believe the shipping and the handling of the package must of been the cause of this problem. I would hope that in the future this part would be metal.
What others should know: The rubber rings for the pins that hold the grip in the front keep popping in and out. This is very frustrating because the cover gets jammed. Also the selector switch fell off during a game, probably because of the shipping.
Things I liked: The helmet is realistic, and is very solid. I shot it with my Echo 1 Task Force Blowback 6, and there was not even a mark. Overall, it's awesome, though it's a bit overpriced...
Things I would have changed: The helmet has a bad chin strap.
What others should know: It's made of good quality plastic.