Plunger tube replaced RFSG

I did this mod hoping to get a blaster with enough air volume to effectively use a hopper or RSCB. The stock plunger tube is pretty small, not all that much bigger than a stampede's. I've replaced the PT, plunger head, trigger (not pictured) and spring rest.

Materials and tools
Acrylic sheet - 5mm thickness
32mm bath plug
32mm PVC or 40mm downpipe
coupler of your choice. (I used a 15-25mm reducer)
a few small screws
superglue/epoxy

Power drill/drill press
hole saw
dremel
file (optional)
screw driver
hacksaw

Here's our spring, plunger rod, plunger tube and shell.



I'm using an Oznerfnerd spring + stock LS spring at the moment and it's still easy to prime.

Here you can see the acrylic disk I'm using as the spring rest and the bath plug.
Since taking this photo I've inverted the bath plug to act as a skirt seal. This way I'm getting a flawless seal.



These are the washers I'm using and the screw. Almost any will do.



You can see here where I've dremeled the shell to fit the plunger tube. This step will take a while.
I actually used the hole saw to open up the front to give me a clean and perfectly circular cut.



Here's the completed plunger rod again.
Notice the bath plug orientation.



You may or may not have to trim the priming rod for it to fit. Since this picture was taken I have moved the PT even further forward negating the need to do this.



Here's some PT comparisons.







Ranges
Definitely getting much better ranges now. Similar to a singled Tripleshot but with a slightly larger air output. Easily passing 120' flat at the moment with the Oznerfnerf and LS spring combo. I'm yet to try a hopper or RSCB on it.

Wow, nice and clean write up.

Great Job!

Nice that's really awesome wish rfsg were easier to find though.

Shame the epic turret gets lost in the process.

mavshot wrote:Nice that's really awesome wish rfsg were easier to find though.

they're easy to find, just expensive.

So happens I have a spare one downstairs, but those ranges sound fairly low. I got roughly similar ranges with stock PT and a much smaller spring combo, with a turret as well. I'd re-measure it mate, I think you may be surprised.


Cheers,

[quote="clunk07"]

mavshot wrote:... those ranges sound fairly low. I got roughly similar ranges with stock PT and a much smaller spring combo, with a turret as well. I'd re-measure it mate, I think you may be surprised.

Cheers,

It's possibly because Unknown's spring isn't long enough. It doesn't look 'pre-compressed'.

Unknown wrote:

Unknown, you could be losing out on potential power and range if your spring is too relaxed in it's unprimed state. With that amount of volume of air, you need all the momentum you can get.

Essentially, your plunger begins to slow down too early in your current configuration.

Yeah, that's definitely something I'm going to have to work on. I'm looking at either making a spring rest similar to that in a Longshot or replacing the spring with a Kha spring.

I'll give it a shot and range test again.

Unknown wrote:Yeah, that's definitely something I'm going to have to work on. I'm looking at either making a spring rest similar to that in a Longshot or replacing the spring with a Kha spring.

I'll give it a shot and range test again.

The spring rest I made was quite simple, and didn't take much time. Just a piece of PVC, and the lid off a jug of spring water.

Cheers,

Here's my progress.