ok I'll be showing you guys how i did my version of goonies longtit mod.
1. Titan tank
2. longshot shell and trigger only
3. epoxy putty
4. acrylic (or some type of thick plastic)
5. (optional3 day epoxy
6. 1m 20mm grey or orange conduit and coupler
7. 2ft of PETG (60cm)2cm of 17/32 brass
8. Etape and hotglue
9. 4mm tubing and 4mm barb
Okey so we've got all our materials, first let's work on the titan tank its self.
first thing i have done is glue in a 2cm piece of 17/32 brass into the front of the air release hole ( this is option but if you want a perfect seal you would want to do it)next thing is to hot glue your 20mm coupler ontop of the 17/32 brass.
last thing you need to do, to your tank is the trigger mech and connecting it to a pump, so first you want to block up the hole that the titan presure gauge went with some hot glue or 3 day epoxy.Next the trigger mech to do this you will need a 4.5cm by 2.5cm rectangle of acrylic and some hotglue, first get your piece of acrylic and cut a slot down the middle of the acrylic 1cm this is where your air release pin will go into. when you have slid the pin in fill the slot you have cut out with some hot glue. last to connect the pump fist super glue a 4mm hose to the original check valve andthen connect your desired pump.(i used a $10 summit pump from kmart)
(push trigger mech)
next we will work on the main trigger. what i have done is cut off about 3cm off the end of the trigger and made a epoxy putty wall 3cm high and 0.5cm wide, this will act as a pusher to push the trgger. Next i exstended the triger pull by half a centimetre.
(this is what it should look like when you make the epoxy wall)
next you want to make your variant breech for all the experiance modders out there should know how to make a variant breech. my variant breech was 2ft long and i used 20mm grey conduit.I have a combination of the 17/32 and etape to acomplish a 100% seal.
CONGRATUALATIONS!! you have finished the hardest part of this mod hahaha
Next onto the shell modification.
Fist you want to cut a slot out for the titan tank, first mark a line 6.5cm from the back of the longshot shell, then draw a line 5.5cm down from the topof the gun. draw another line 12cm across from the end of where your first cut was( make sure these cuts are a bit smaller because we are trying to achive a friction fit on the tank). proside cutting 5.5cm up from the end of your 12cm cut. replicate the mesurements onto the other side of the shell.
Thats all your need to do the exterior of the shell, lets go inside of the shell what you want to now is to carv the whole back of the shell (like take out all the walls) ONLY the back portion of the shell!!
You are basically done now to put everything back together and check if it all fits if not ajust.
your one if you did it all properly should look like this>
Now BLING your gun out.
ranges on this thing are crazy if you did it right they are around +190ft with only 3 pumps.
if you have any problems feel free to pm me