increasing part of this mod are imaseoulman's ideas and practices. Everything else I did myself.
This mod is basically going to making a 2K as effective as an SM1.5K. So first, we must ask
ourselves, why do 1.5K's get so much better ranges than 2K's? They have identical tanks, and
their turrets have the same kind of sealing mech. So why is this? Air-flow. Air-flow is why the
1.5K performs so much better. If you look at the holes in the turret of a 1.5K, they are
considerably larger than those of a 2K. Take a look at the stem that leads from the airtank of a
1.5K to the guns turret. Also larger than that of a 2K. You fix those two choke points, your 2K
will be performing similarly to a 1.5K.
Now for the actual write-up. Open up your 2K and take out the internals. Take the air tank and
grab the stem leading to the turret with some pliers. Wiggle it around until it rips off. Using wire
cutters, snip off where the goo gauge connects to the tank.
Now widen the hole with a screw driver that has a bit less than a 1/4" diameter. Be sure to hold
the tank upside down while twisting, so bits of platic don't go into the valve.
Once the hole is a tight fit on 1/4" OD vinyl tubing, super glue about 2-3 inch stub of tubing in (the
picture below has too little tubing, I remedy that later on).
Now cut the goo gauge off of the yellow tubing as close to the goo gauge piece as possible.
Using the valve stem piece we took off earlier as a coupler, super glue in the new tubing and the
stock yellow tubing. (Here you'll notice that I had to use more tubing and find another "coupler"
to make up for my previous mistake. The "coupler" is from a dead LPEG airsoft gun and was
previously the gun's barrel.)
Now plug the pump. Put away the valve for now and take out the turret. Unscrew the center
screw. If the orange piece the screw holds on doesn't fall out, grab it with some pliers and pull it
out. Now start removing the stock barrels by slowly wiggling them out. Don't bend the barrel
outwards from the turret, because that will crack the barrel stubs, which you need intact to house
If some barrels don't come out, dip their bases in boiling water and then wiggle them out right after
pulling them out of the water. Wear gloves! Here's what it should look like if you did it right, save
for the cracked barrel stub. Hopefully you didn't do that like I did.
Let's take a look at those pansy turret holes.
These need to be widened. The following is a picture from the back. The shaded green part is
what needs to go. Don't go past the dark green line or you'll ruin the turret's seal. I accomplished
this by first twisting old scissors through there, and then twisting through a flat head screw driver
through which at it's widest point is the exact size of the sealing mech you don't want to fuck up.
Here's what it should now look like. Do this to all four holes. Also the back end of the turret may
need a little widening. Just don't go past the sealing mech.
Now slap in some barrels. They can be longer then your standard 2K barrels because of the
airflow mod. I used 8-1/2" of PETG. Don't necessarily use that, because it changes depending on
dart fit. Just use about 2 to 3 inches more than what you would normally re-barrel a 2K with.
Now for connecting the valve to the turret. Take the turret and glue some 17/32" brass on like
so. Be sure that the brass doesn't go as high as the orange piece that holds the spring on, or else
you're turret won't rotate properly and the brass will be at an angle to the turret base. Been there,
Now take some 1/2" brass and glue it onto the valve like so. The size I can't remember exactly,
but it needs to be near perfect. Basically measure so that when its cut the 1/2" brass will go as far
into the 17/32" as possible while still being able to fit the turret and the valve into the shell.
Now for the pump. Take a 1/2" PVC elbow and glue in a segment of PVC. Super glue or epoxy
this onto the pump shaft after removing the stock pump handle.
When that dries fill the other end of the elbow up with hot glue, but leave enough room for PVC
to be inserted into that end.
Put everything back in the shell. That white piece inside the gray cover is a check valve. I busted
the stock one.
Edited by TantumBull, 09 January 2009 - 11:19 PM.