[Spike]

So I acquired an SRC RPK in a trade... i know that the internals are shitty, so I want to essentially rip everything out and use the obscenely long barrel to my advantage and make plastic laser beam spitter out of it.

I've been researching and seeing mixed reviews about when you need a bore up kit. The full inner barrel length is 640/650mm which some people say you need a bore up kit with, and others say it won't matter because it's too damn big anyway.

Would it be better to run a shorter inner barrel in it, like a 509 or something similar? I've never dealt with a set up this long before.

Also, for a snappy trigger response, high speed gears+high torque motor, yes?

Here's what I was thinking:

ARS Piston+cylinder head
Modify cylinder
Modify nozzle
SHS 15 teeth piston
Prommy 509mm (or 550?) 6.03 inner barrel
SHS neo magnet high torque motor

it already has a nice hop up unit in it...forget the brand