I LOVE THIS GUN! First of all it is built really well and is DEPENDABLE! I have not had one problem with the gun so far and I've played every weekend for the last few months. I've probably put 15,000 rounds through it so far and have had no problems what-so-ever. It also feels really solid and it is surprisingly heavy. Still light enough to carry all day. you need to shoot .25g bb's for sure. The hop up on this gun is beast. I read that some people had problems with mag wobble but I haven't had any issues with that and I've swapped mags a lot, either letting people try it out or just handing mags back and forth during fire fights. I am super pleased with this gun and if you are trying to decide whether to get it or not...you have to get it.
Easy to take apart
Comfortable to hold
Takes any G36 upgrade parts
M4 mag ready so you can swap mags with all your friends
Ambidextrous fire selector switch
The hop up works like a boss
Ample rail space
Loop for a single point sling
Nice weight to it
The only cons I can thing of are
You will probably want to buy a 6.01 or 6.02 tight bore barrel if you play anything other than CQB and when you do it is phenomenally accurate.
The built in sights kind of got in the way when I mounted my sight so there's an inch where I couldn't mount it but no big deal. And it is because I bought a cheap red dot.
Rating: [5 of 5 Stars!]