4 replies to this topic

[Spoon]

Ok, so the AT3K arrived a few days ago and the AT4K arrived today. I havn't taken apart either yet, but have been considering mod possibilities on them and bouncing some ideas off of Cxwq. Here are my first impressions of the guns STOCK:

AT3K: Unmodded, it has NO power, nothing. It gets literally 10 feet on 3 pumps (any more and the overpressure release valve kicks in). The overpressure valve in this gun (at least in mine) is very weak, and will let air out after about 2 1/2 pumps. Plug it, and you should see a exponential increase in range and power. Replace the barrels and the gun should rock. I do not at all doubt claims of 80' flat with brass barrels. The barrel rotation mechanism works like a fucking BMW, I've abused it in every way possible, pumping REALLY fast and hard, pumping very very slowly, holding the trigger and just pumping over and over, and it's never skipped or failed to rotate once, it's clean and reliable. Definately exciting since I plan to replace the barrels with 5" brass ones, as near as I can tell it should definately not have any problems. The handle is pretty small, my pinky kinda falls off, and the trigger keeps pinching my finger a bit, but nothing major. The pump handle has a VERY short length of travel, and the handle is smooth so if your hands are sweaty you'll have a hard time holding on. I'm going to slap some grip-tape on it and that should help. If you want to replace the pump you'll have to watch out for the barrel rotation mechanism catch, as I think it's a mechanical latch that rotates the barrels. Overall the gun is compact, sturdy and (once modded) should provide decent power and accuracy, with great reliability. This will probably become my new main gun.

AT4k: This one just came today, but my opinions on it are pretty clear. I was actually pleasantly suprised. First off, it's big. About the size of a older model SM 3k, although a lot of that size extends backwards past the handle. The handle BTW is huge and very comfortable for people with larger hands, it actually really feels like the handle of a rifle or something, and the trigger as well is larger and easier to use. The pump however is even worse than on the AT3K and grip tape is practically a necessity to pump with any ease. Suprisingly enough the AT4K unmodded has about twice the range of a unmodded AT3K, with much better power. Still not powerful enough for most nerf wars, but you probably wouldn't get slaughtered with 12 shots at your disposal. The overpressure release valve seems a lot tighter on the AT4K. The barrel rotation mechanism works very well, but just doesn't feel quite as sturdy as the AT3K's, and you have to move the pump handle ALL the way forward to engage the rotation catch, which during very fast pumping could cause problems by not moving the handle forward enough. It's definately reliable enough for stock use, but put 12 5" brass barrels on there and I just doubt it would work as well. However once Cxwq gets some of that PETG tubing he mentioned in the Trading forum, that stuff may well prove to be perfect due to it's incredibly light weight. My dream mod for this gun would be to replace the barrels with PETG tubing and replace the pump with a larger one, such as a Powerclip's pump as per Cxwq's suggestion. With the approximately triple air capacity of the PC's pump over this one, you would only need one pump per shot, effectively turning the AT4K into a 12 shot pump action shotgun/rifle. It would be awesome. You would however need to make sure that the new pump handle would still make the barrels rotate properly. Overall I wouldn't say it has the "everyman" gun potential that the AT3K has, but properly modded the AT4K may well put a great many people in their place on the battlefield.

Now with the liquid guage thing....I actually can see some use for it, I mean it tells you if you've pumped or not and thats not bad, but does it detract from the air pressure of the shot? Or is the liquid guage a different pressure system than the main pressure tank. I don't want to drain the fluid to get more tank space, I want as little tank space as possible (within reason) to maximize the overall pressure. Can I just bypass the liquid tank entirely and connect the hose directly to the pressure tank? Would that help/hinder? What about other mods you've tried or would want to try to the AT3K or AT4K? Discuss.

[WebbZter]

Sounds like you've been having fun! You are correct about the barrel rotation mechanism. When you push the pump forward a protruding piece of plastic on the front of the pump pushes a piece of the barrel rotation assembly making the barrels turn. It would be difficult to replace the pump with another one and still have the barrels rotate. You would need to attach a piece of plastic to the new pump so it works like the old one.

[Nerf Master]

As, done by others, including myself, you can relocate the pump out of the front of the gun. Just remove the original blue pump handle, so that you keep the original pump, but you extend the tubing on the pump out of the gun towards the front, cutting a hole in the casing in front of the pump. Then it's sticking out the front, and you attach some sort of padding. Then you can pump it in a style that is normal, like on a PC. Though, the pump strokes are still short, but you can get fuller strokes per pump. Although this was done to the 3000, I assume it can be used on the 4000 also.

[Spoon]

That still wouldn't help much, as it wouldnt' change the volume of air delivered per pump, which is what I'd be trying to improve on the AT4K.

[Puddle of Foam]

I've been thinking of modding my AT4000, also. I wasn't impressed with its stock range. It's ok for close combat though.