I purchased this gun last summer and it took a couple weeks for Airsoft GI to build it but it was well worth the wait. It operates just like a real m4, extremely sturdy, shoots straight, and no wobble at all. I am very pleased with the Daniel Defense rail system that was put on. All in the gun was well worth the money and if I was you I would purchase this gun the next time itís in stock.
Speed buffer to allow fps to change
Operates like a real m4
Disassembles like a real m4 too
Mags are a bit more if you are upgrading from an AEG (not necessarily a big problem)
To take the pistol grip off you have to use a torque screwdriver (T25 I believe) to change the pistol grip (not really a problem just an inconvenience)
No serious problems
Rating: [5 of 5 Stars!]