I was skiddish about purchasing this, mostly because nobody wants to buy a gun with no review and get a dud product. I am here to put away any doubts or fears of buyers remorse. When my M4 first arrived I was beyond ecstatic to find out how well this beautiful machine performs. I can say that the gun functions very smoothly. It has a lovely amount of kick that gets you almost feeling like you are firing real steel. This gives me a boost of adrenaline when I play because every shot feels so much sweeter. The sound of this gun firing is so crisp and loud, it will undoubtedly strike fear into the most hardcore of players. Everyone I have played against has no intention of being on the opposite end of the barrel, because this baby really packs a punch, and an accurate one at that!
-The gun shoots HARD! For out of the box, I get a lot of shit from my opponents about the pain this induces.
-Very accurate. I use cans for practice because they are cheap and bountiful. I can shoot this M4 on full auto and hear every last "ping" as each bb rips through the water-filled can. Not a single miss at about 30 yards. I even slapped a rifle scope on it for a while and used it as an out of the box DMR.
-The rail is amazing. Not only is it beautiful but it is sturdy.
-Gas in the mag is enough for 2 clips of ammo in warm weather.
-In cold weather, only this KWA M4 can deliver. I have a KWA GBB M1911 and it doesn't function cold. But luckily I was the only one on the field able to wield this baby. Everyone was amazed I could get a full mag of compressed green gas in 20 degree weather.
-The stock is not of high quality. It feels a little flimsy. And from what I understand you cannot replace it with a standard airsoft stock. You have to get an actual 'real steel' gun stock.
-You are advised to NEVER USE PROPANE. Only use green gas. This is a con because propane is usually so much cheaper. Propane works, but KWA will void your warranty if you use it.
-The O-rings are total crap, they will break and crack eventually. This means you can't fill your mag with green gas anymore. Not a huge problem though, just go pick up a pack of high quality O-rings, slip them in, and you are good to go!
-My biggest and worst issue is that I bought a second mag. I am not sure which mag has the issue now, the original or the spare I purchased. But ONE of them is leaking right now. This apparently is a known issue with the KWA GBB M4. I bought a kit to fix it but I have not yet gotten around to it. Be forewarned, these mags have a leaking problem. And it isn't a slow leak, it is instant emptying.
Rating: [4 of 5 Stars!]