This is a great gun. I was going to buy the one with rails but I'm more a fan of the Daniel Defense MK18 II rails and not the Omegas that are on the other one. So I bought the MK18 system and put that on it. Anyway, the gun is probably the most SOLID gun, internally & externally, that I have ever owned. But that's not just this gun, that's mostly any VFC made gun. The externals are CNC aluminum. VFC made guns seem to feel the most like a real firearm out of any Airsoft gun I've handled. So to say it in short, absolutely BEAUTIFUL externals. Also this gun has amazing internals. I love the self shimming gears(which means the sector and spur gear have springs on them, and when they start to spin, the springs make the gears line up very nicely). The motor pulls back the ~M120 spring and cycles the gearbox at about 18-22 bbs per second on a 9.6V battery! So I don't even bother using a lipo. Gears are also very strong and nicely cut. Aluminum ported cylinder head is great! I also believe the gearbox is CNC. So in short, this gun has AMAZING internals as well. You will not be disappointed with this gun. BUY IT.
-HIGH rate of fire
-very smooth running gearbox
-quick trigger response
-paint is the same color tan as MagPul. So accessories match very nicely!
-it's OEM'd by VFC!! :D
-battery crane stock
-I love the Airsoft GI engraved logo on the side of the magwell. Looks great!
-no rails (usually would be a con, but I like to completely personalize my gun with my own stuff. So it's a pro for me).
-high FPS ~420 (could be a com for some people, but my local field has no limit.
-FPS is to high for some fields, but not mine! :D so the high FPS is a pro for me.
-flash hider was very tight, (just heat it up with a blowdryer first, to get it off.)
-piston teeth could be a little stronger
-no rails, but that was a pro for me! More customization for me to do! :P
- other than that, absolutely nothing bad about this gun!! I love it!