"Ok so this gun is just great. Got mine today, and its built like a tank. I love the great feel of it, and its very robust. It feels very sturdy as well. The forward top rail is a little wobbly, not too much, but every other piece of this gun is rock solid. The stock is really tough material, not metal, but some type of polymer. And no, its not just regular old plastic. The flash hider looks beast too! Haven't chronographed yet but i shot a couple rounds through it, and it feels very fast, too fast for me to see. The rate of fire is nice and fast. The iron sights are pretty good, but I have some Daniel Defense i'll be mounting on there instead. The forward grip is a little wobbly in the grip, the mount is solid though. You should know that this gun is pretty freakin big. Its a nice weight, feels heavier than 8 pounds though. The weight might get a little heavy after a long play time ( I recommend a sling). Overall AMAZING GUN. Don't miss out on this amazing weapon."