First thing I noticed is that this gun comes with the stock from an m733. It feels sturdy enough, and the hop-up is very consistent. Thats where the good ends.
On mine, with the hop-up perfectly adjusted the bbs strike the 80ft mark about a foot over where the sights are lined up. This is because the rear sight won't go low enough and the front won't go high enough. So you'll need a red dot.
The accuracy is far below par. This gun has an 80ft engagement distance if you want to be hitting people effectively. You can stretch it out to 100ft and no further. But 80 is really the most effective range. This is because the barrel, although nicely machined, is a 6.08. You will need a tightbore.
The worst part of this gun is the motor. It's garbage. I use a 9.6v 2700mah nun-chuck and the gun still has horrid reaction on semi auto. It is unbearably bad. Full auto with that battery is just fine though. Also you have to be very careful when shooting to be sure the you leave the piston all the way forward in auto and to let the gun finish cycling in semi so the piston isn't all the way cocked. This is important on all AEG's but especially this one. When my battery is about halfway empty the motor won't have enough power to finish the cycle if the piston is even 3/4th of the way back. The gun is effectively jammed till I charge the battery. Again this is with a 9.6v 2700mah, with that kind of power I shouldn't be having this problem at only half charge. I cannot describe the frustration I had one day when I was forced to leave a game early because this happened and no one had a spare battery. You'll need a CA standard motor, or really anything else.
This gun does have a problem with locking up as someone mentioned earlier. When shooting in semi the trigger sometimes just won't pull past halfway. You have to fire a few shots in Full Auto to "unlock" the gearbox. No clue why this happens, it is rare.
If all you want to talk about is getting hits in a real game, the motor and lock-up issue can be discounted. The issue with the sights and accuracy are enough to put you in a situation where you WILL BE overwhelmingly out-gunned in a regular game. This Sportline, in my experience, is a good gun if you are planning on fixing the few minor issues as described above. After these have been addressed this is a very reliable and very respectable gun that will easily keep up with the average competition at a regular game.
I would also like to address the previous reviews. This gun CANNOT shoot 200 feet, and is not accurate at 180. PERIOD. I don't know if these people just aren't particularly skilled in distance judgment (which is no big deal, most people aren't) or they just like to brag. I would hate to see anyone buy this gun because they believe it has this kind of performance because IT DOES NOT. The point of a review is to tell people who have yet to buy it what to expect. DO NOT expect 180ft range out-of-the-box performance if you buy this gun.
Issue with sights; you will need to find a solution
Issue with accuracy; you will need to find a solution
Issue with motor; a more powerful battery will not fix this, you will need to find a solution
Issue with locking up; someone earlier said replacing the wiring system fixes this
Rating: [3 of 5 Stars!]