||I just received my KM4A1 and it great. It has an extremely high rate of fire and the FPS is perfect for playing at outdoor fields. I definitely recommend buying a li-po for this gun as it makes the ROF insane. I have a 509mm tightbore and a mock supressor covering it and it is dead accurate.
Li-po ready out of the box
Fps around 400
Easy to customize
Flash Hider is hard to remove
A little pricey
Only takes specific mags so if you have m4 mags they probably wont fit
Overall this gun is one of the best guns you can buy and certainly the best m4 on the market. I definitely recommend buying this gun.
Rating: [5 of 5 Stars!]