AGD FLATLINE
Older picture of my gun.
The AGD Flatline is the ultimate air system for the money.  It may be a bit small, but it is a performer.  The first thing I noticed after I put it on my gun was how much smoother it made my gun shoot.  One of the nice things about nitro is that it actually warms up when you get it filled.  It feels nice compared to a freezing CO2 bottle.  Now to the features.  What does this have on it that makes it so much worth the money?  Well, the first thing you notice when you look at it is that it comes with a drop forward.  It drops it a decent amount.  It works, and as long as you aren't a front player who goes in the smallest bunkers possible, you will be fine.  The next thing is the easy to use on/off.  You really can't see it in my picture, but it is located on the bottom of my regulator.  All you have to do is a 1/4 turn.  It even has on or off written in big letters to tell you which way to turn it.  Not the best thing, but nice, it comes with micro gauges that usually have to be bought aftermarket.  The only bad thing about this tank is the number of shots.  You get about 700-800 shots with it.  If you are rec or a small tourny player you should be fine, but if you shoot more than that in a game, then this is not for you.  This tank has no shoot down.  It has excellent flow that can be compared to geddons and hyperflows.  The only thing you need for this tank is some type of air adaptor, a fill nipple cover, and a tank cover to protect from dings.  I highly suggest this tank.  It is well worth it for under 300 dollars.