All parts I was worried about assembling came preassembled. The gear box comes assembled and greased, the barrel and hop up come together. the kit was fairly easy to assemble. I would suggest getting some punch tools and rubber hammer from harbor freight and some Permatex dielectric Grease (from AutoZone)100% silicon for the piston O-ring seal. I only had to glue the fake metal pins on the out side of the gun all other gluing (piston rack gear to the piston) had been done previously. The gun has a very solid and hefty feel and reacts like one solid piece unlike other AEGís that creek, wobble and flex. I am in the Air Force so I train from time to time with the M4, it is nice to have an exact replica to use while playing Airsoft, it helps to keep my skills sharp for the dessert. Donít expect this gun to make you a better Airsoft player. Though this gun is accurate my friend has an M4 G&G with upgrades that is more accurate for around 400$ but this gun has much better tolerances and engineering and will out last the G&G. Worth every penny for those who understand the quality. I use TSDtactical .23g 5000count bag from Amazon.com 11.99 price and free ship for orders over $25, they work flawlessly.
PTW CK and 9.6v battery $866.50 Out the door with 10% off coupon code "Chris" May
Excellent gun for the price
if you want the feel of a real M4 this is it
build quality can't be beat
gearbox is whiney
no trades and markings for safety semi or auto
Airsplat has systema mags for $34 each wish AirsoftGI would go that cheep
Celcius CTW came out 2 days after I bought this. unsure if the celcius is any good but I would have considered it if I knew about it at the time.
Rating: [5 of 5 Stars!]