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Hey guys its Dirty Dan here, today we're going to be installing a Systema M120 spring into
this new Matrix m4 rear-wired gearbox. This is going into Minze's gun so let's get started.
On the right side, there are nine screws. four on the top, 1, 2, 3, 4, 5, on the bottom
here. So you need to unscrew those to get into the gearbox. So here we go! Make sure
to keep track of your screws. So when all nine screws are out, it is now time to pry
open the gearbox. Now this Matrix gearbox is weird that i guess the spring guide has
a hole in it or something because, that is going all the way through. So just hold it
down, hold down the cylinder because the spring, and just kinda slowly work it open. There
is the spring guide so watch out, so that's going to pop out because we have a spring
there. There we go, that is how you disassemble a gearbox, ladies and gentlemen. OK so now
that the gearbox is open; we're gonna take the spring guide out and the spring out of
the cylinder and we are going to put our new Systema M120 spring in it. Make sure the side
were it coils close to each other goes to the spring guide first and you just put it
in then you just push it in, then put the outer shell back on and that's it. so we will
go do that now. That is how you put a spring into a gearbox. This has been Dirty Dan, thannk
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