received this gun from airsoft GI about 2 weeks ago. right out of the box this gun is outstanding. this is unbelievably durable. The hand guard and bottom receiver are both plastic. it is unbelievably well made plastic. It is heavy and strong as hell. the rest of it is metal, and high quality metal. the stock is sturdy, there is 4 positions of it and there is no wobble to it in any position. it includes 4 mounting rails, three go on the hand guard (left, right, and bottom), and one mounts in the middle of the upper receiver to put on red dots and holographic sights. the iron sight do come off. for the price, This is G&G at its best.
+this is under warrant, and opening it up voids the warranty i think. so im sorry i cant be more detailed on the internals.
-about 345fps (perfect for field and CQB, i use it for both)
-ridiculous ROF (i ordered it with a 1600mah 9.6v)
-everything is solid on this gun
-I'm a lefty, and very comfortable
-mag wobble (doesn't affect anything, but bothers out of me)
-battery is annoying to get in.