"I bought this gun about a week ago and immediately played with it for a full day, and here are my initial impressions:
-This gun has an excellent weight to it (around 7.5 lbs). Admittedly, I was heavier than I expected when I first picked it up, but you should still have no problem carrying this around all day.
-It is very sturdy. The main body is composed of a single block of nylon fiber, and it is not something you have to be gentle with. As someone who is notoriously hard on gear, I am ever thankful for that.
-It is officially licensed by FN Herstal, the company that makes the real F2000. This means that it has all of the trademarks and details of the real thing, excepting the flash hider (which I will mention later).
-The scope that comes on the hunter version is fantastic. It has a clear sight picture and has a 3.5x magnification. Out of the box, it is pretty much sighted in. It might could use some fine-tuning, but I never touched it and it served me just fine. If yours is not, however, it can be adjusted by popping off the lid and twisting some knobs, just like with a normal rifle scope. If you happen to not like the scope, it is also very easily removable, and has standard rails underneath. Unless that $10 is a sentimental gift from your great-grandmother, there is no reason to not shell out for the hunter version, because the scope is well worth the money.
-Since it is a bullpup, it is more accurate than most guns its size, simply because the barrel can start further back in the gun.
-The screw on the back can dial muzzle velocity up and down within a certain window, making this a viable option for both CQ and midrange.
-I can reasonably assume that this gun is totally ambidextrous, just like the real one. Unfortunately I cannot confirm this, as I am not a leftie and neither are my airsofting friends.
-The gun feels great in your hands. I never felt any discomfort from the way the gun was shaped or weighted, and there isn't anything sharp for you to cut or pinch yourself on either.
-The barrel assembly is easily removable, simply by removing a small pin above the grip. Your entire inner barrel can be changed out without using any tools whatsoever.
-The flash hider is an M4 birdcage style flash hider. As you probably know, that is not the flash hider that goes on a real F2000. For a $380 gun, especially one that is licensed by FN Herstal itself, that is a crying shame. In addition, the flash hider on my gun appears to have a large chip taken out of it straight from the box (roughly the size of my pinky fingertip). I'm not sure if that's intentional or not, but it still detracts from the aesthetics of the gun so I'm saying that's a con regardless.
-The butt plate is an absolute bear to remove. Flipping it halfway inside out and sliding it off is the only way to do it (and is the way listed in the manual) but I can't imagine that's good for the rubber. After only a day, a small rubber tab near the bottom of the plate's inside has almost completely torn off. It's probably insignificant and very possibly my own fault, but is disappointing nonetheless.
-The magwell is not closed off to the rest of the gun. This means that if bbs are loose in the magwell, they can and probably will work their way into the inner workings of the gun. This happened to me and a bb worked its way behind the trigger, making it impossible to fire the weapon. They also started to rattle around in the battery compartment, and I had to wrestle the butt plate off and take the upper receiver off to shake all of the bbs out.
-I had an issue with the hi-cap magazine that came with the gun where the loading door didn't close all the way. This, combined with the previously listed con, resulted in a rather unpleasant situation that took some effort to resolve. As of yet, I am unsure of whether something was wrong with the magazine itself or if it was my own fault.
-While we're talking about magazines, it is important to note that this gun WILL NOT TAKE STANDARD, UNMODIFIED MID-CAPS. You either have to buy G&G mid-caps, file down the ones you have, or use a hi-cap.
-The selective fire switch is fairly hard to turn, and a lot of times when you try to set it on semiauto, you will just skip right over it because of the force you have to apply to get it to move at all.
-The hop-up, while very easy to access, is hard to turn and is located fairly deep in the gun. This makes it difficult to adjust unless you remove the upper receiver and pull the inner barrel out.
-The lid of the scope is hard to put back into place, but with practice it shouldn't be much trouble.
I'M NOT SURE:
-The way full auto works is that you pull the trigger partway and it only fires once, then when you fully depress it, it begins to fire in full auto. This makes it easy to fire semiauto without switching the selective fire to semi, but it also causes you to have a long trigger pull when you actually want to fire in full auto. I'm not totally sure if I like that yet, but I don't necessarily dislike it either.
-The box tells you that it shoots 510. This was measured with .12 grams, and is misleading. I had the gun chronoed with .25 grams, and it was getting about 280. I have a hard time believing this having played with it for a day, and the guy was holding the chronograph in his hand so he may have been moving it a little causing an inaccurate reading. For this reason, I'm not listing it as a con.
TL;DR: This is a very solid gun in both construction and performance, and I would definitely recommend it.
"I bought this gun around 2 months ago and right when I took it out of the box, I fell in love. Though it looks bulky, it is pretty light (around 7 pounds) and it feels great.
FPS is change able so it is good for outdoors and CQB.
Extremely accurate. (theres a rumor that G&G guns come with preinstalled tight bores)
Scope is very nice
Bullpup design allow there to be a longer barrel.
Hop-up adjustment is tight (hard to turn the spinning wheel thingy)
Overall, its a great gun.