you need:
Big blast
2" pvc cap
1/2" cpvc pipe
Thick walled 1/2" Pvc pipe
Tape (Electrical or duck it doesn't matter.)
Drill and Drill bits
Hot glue and hot glue gun
hacksaw
screwdrivers (flat and Phillips head)
To begin, take the flat head screwdriver and pry off the orange ring attached to the front of the gun, Like so.
Next, open up the gun, it should be like this (If it isn't you have the wrong gun.)
Next, take a drill bit and drill a hole in the bottom of the pvc cap. You will need to make it large enough for the barrel post to fit inside of it snugly. (It is just easier to work with if the fit is snug as oppose to loose.)
Next, use the hacksaw to cut off the black post to half an inch above the dividing piece between the barrel and the inside of the gun. To ensure the post is short enough, put the post though the hole in the cap (which will rest in the barrel cavity) and about 1/4-1/2" should be inside the cap. It will look this.
Next, cut six 5" lengths of Cpvc pipe. Then cut 10 1/2" rings of the thick walled pvc pipe, they should look like this.
Take the pvc pipe and insert the cpvc pipe into the pvc pipe. It will be a tight fit but they will go in and stay in. do this on both ends of 5 of the lengths of the cpvc pipe.
Now use the hot glue gun to glue the pipe with the rings around the pipe length with out them. Do this on the top and bottom. Then wrap one end with tape to thicken the entire piece making it easier to insert into the cap. Seal all spaces on the taped end with hot glue (including the space between the pipe and the tape).It will look something like this if you have done it right.
Now insert the barrels into the cap tape end down. The tape adds thickness to the barrels making it easier to seal. Seal all the space between the cap and the barrels with hot glue. Ensure that it is sealed completely so you do not have to go back and fix it later.
Next, take the cap and insert the post into it. Seal the two with hot glue.
Now to improve on the gun. Take the pump handle out of the pump chamber. On the end opposite the handle there is a small hole, seal it with hot glue. By doing so you seal the pressure overflow valve which allows you to fill the air tank to much higher pressures than before.
Put the gun back together ( you may have to squeeze the front half of the gun in order to get a flush fit, the cap will be a snug fit in the former barrel cavity.)
Your done, here is what mine looked like. The one barrel is a little long but I was pressed for time and had to get the modification done in half the time it normally takes me, so its a little sloppy.
My ranges (Posted at the end) average to 77' for all six darts. They all landed within one foot of each other laterally, so the spread is 3-6 feet, I've used this in a couple of wars and it is accurate enough, and the spread is enough, that it is hard to dodge.
Edited by Equilox, 02 December 2009 - 02:34 PM.
