Hmm...what did I do on my Saturday? I made a contribution to the Haven! I've noticed that a common question by newcomers is how to mod their AT2k. My goal in this thread is to provide a detailed how-to on single barrel modding the AirTech 2000. This can be used as a common reference point for those who want to make one. With that said, here she be.
The first step is obviously to open the gun. This picture above shows you how the gun is laid out upon opening. If you, for some reason, are unable to piece things back together, refer to it.
Next, I reinforced the trigger spring with hot glue (if you look closely, you'll notice it). Why? With the increased air pressure your gun will need to handle shortly, the trigger needs to have a more durable spring to pull back the firing pin in the airtank. You may have also heard of placing a piece of BIC pen or a straw here to reinforce, and that works just as well.
This is the point where you may plug the over-pressure release valve in your pump. Unfortunately, I don't have a picture of this process so you'll just have to bear with me. Remove your pump from the pump shaft. You will see a little hole at the end of the pump. You want to plug this so more air is injected into the tank. More air = more pressure = More distance = a happier you. To plug this, take a hot glue gun and apply glue to cover the hole. This is a standard procedure in modifying air guns, so if you are confused you may refer to another modification thread.
Barrel replacement. As stated before, this mod is meant to replace the 4 shot turret with one functional barrel. My choice of barrel is a crayola barrel, nested in SCH 40 1/2" PVC. What this means is that you remove the innards of a crayola marker so that a dart may fit inside, and you slide the PVC over the outside to add length to the barrel. The objective of this barrel replacement is to increase barrel length and make a tighter air seal around the dart. I used RoseArt markers for my barrel, as they don't have the same pesky ridges on the inside as Crayola markers do (seen above).
Here's the catch that the veterans will notice. I left the attachment of the marker/marker cap on the barrel. I hollowed out the cap of the marker and it fits snugly over the area where barrel meets airtank. I then stuck the marker into the cap for a snug fit and I wrapped the mechanism with duct tape to make sure it stayed together. For the newer readers, this cap isn't necessary. You may just cut the attaching part off your crayola and fasten that to the tank. I just did this to be original.
Now you may reassemble the gun. At this point you will slide your SCH 40 1/2" PVC over the marker until it ceases to move. I used a 6 1/2" length of PVC over my crayola.
After you place your barrel, you will notice that it is quite wobbly. Since this would greatly reduce your accuracy in a war, you want to make it a stiff fit. To do so, I took a section of old t-shirt and packed it into the opening above the barrel. I then stuck some hockey tape over it to hold it in. I took more hockey taped and wrapped the barrel at the base just to make sure it stays put.
There you have it: a single barrel AirTech 2000. It is a very simple/basic mod, yet it will perform wonders for you. Hopefully, this was easy enough for you to follow. It was meant to be user-friendly. I ran a range test on the gun and this is what I found:
Trial #1: 97'4"
Trial #2: 88'11"
Trial #3: 89'7"
Trial #4: 95'6"
Trial #5: 91'2"
I paced these distances off and measured by my walking gait and a 12 inch ruler. It was quite cold out too (hi-30s, lo-40s), so if temperature affects its flight, it may go further/shorter come summertime.
Questions, comments, criticism, snide remarks? Let's hear em!
EDIT: Ranges are based off of size 3/0 splitshot weighted stefans.
Edited by LordoftheRing434, 25 March 2006 - 11:04 PM.