I'm not sure 3K's get better ranges than 2K's. Has anybody hit 120' with a 3K yet? Or even 100'?
I've gotten over 100 flat (but not 120) with a couple of SM3Ks, so it should be possible with AT3Ks - the tanks appear to be dimensionally identical. Now that I have a pile of AT3Ks from WalMart, I might try the same mods.
Are you getting over100' flat with your SM3K turreted or did you single it?
Also, I don't know if I have some sort of freak AT3K but the valve is at least as large as the AT2K (after my flow rate mod) if not a little bigger, but I'm pretty sure they're the exact same size.
So why does the AT3K suck at ranges? Two main problems:
1) PRESSURE: The slide style pump makes it more difficult to get it up to higher pressure, so even though the internals can handle more pressure, the pump's not delivering that pressure. This is why a mere pump replacement on a 3K seems to improve range so much.
2) TURRET SEAL: It sucks, badly. I've thought about putting an o-ring and stronger spring between the tank stem and the turret, but I haven't gotten around to it yet. The turret does seriously limit air output.
Solve those two problems, and you'll have an incredible blaster on your hands.