I bought the M4 last year 2009. First gun I have ever bought and it is amazing. I have had no problems with it since I got it. All FULL METAL. Rate Of Fire is good I would recommend a battery upgrade to a 9.6v the gun can handle it with ease and the ROF go up quite a bit. FPS is really good around 380-400. Very sturdy gun and handles with with extreme use on full auto and semi auto. Mag works great. Sights are good and everythings is a sturdy.
I upgraded my gun with a 6.03mm madbull tighter bore barrel and has so much better accuracy.
Also madbull blue bucking and the systema silent head set with the 9.6V battery. Cheap upgrades that make a difference with accuracy, performance, and FPS. i Also got a red dot sight and it just works great. There is a slight wobble in the RIS but can be fixed by tighting the screw and adding some tape or velcro to the RIS
Great first gun and very sturdy
FPS is great
ROF is great
Easy to upgrade without spending alot of money
Good price for a great gun.
Prefer battery in stock
Rating: [5 of 5 Stars!]