I recently bought a G4-18 from ASGI and this thing is amazing!
ASGI has great customer service, built and shipped the gun very expediently.
The Daniel Defense Rail System is absolutely beautiful and the gun if overall very solid.
No magazine wobble, solid crane stock and strong Nylon fiber body makes this gun a great buy as well as lightweight.
The flashhider is plastic (as well as orange) that is kept in place by a hex screw key and the barrel extension screws off with easy for those who like to either shorten it to a more CQB length or wish to attach a barrel extension such as a mock silencer.
My only complaints with this gun is the fact that the rear sight is not the same as pictured. It is not a flip up but a H&K style commonly seen on the HK416 and MP5 series. Not a serious issue as it still works great.
The dust cover has a little problem with wanting to open when the gun is tapped on the opposite side of the receiver, but its still no biggie as I play with it open and it shows off the nice Arabic script and words "INFIDEL" on the inside so it's more or less wanting to show off its sweet markings. ;)
Haven't gotten around to much shooting, but this is definitely going to be my main at my next Op,
Tan is very sleek
Ton of rail space
Fully Licensed rail by Daniel Defense
Excellent Price for such a reliable gun
ASGI crono'd mine at 440 fps making it perfect for field
Dust cover doesn't stay shut (May just pertain to mine)
Small chip on receiver (Again, just mine)
Orange flashhider (not really a con)
Rating: [5 of 5 Stars!]