12 gram pump mag build

[captian pinky]

so i have slowly but surely been building a pump mag.

the plan:
ule body
classic valve
rt on/off
lvl 10
agd pump kit
agd 6 pak
12 gram efficiency insert




so i have read about people taking hack saws and such to valves trying to open them luckily i have access to a lathe. I knew i wanted to atleast try it for myself


so here is a bit of progress i made on it.

open says me:









from there i decided to make my own insert, figured worst that would happen is i end up with a pile of chips.



here it is:









so i have aired it up no leaks thankfully, however i was testing with hpa and my velocity maxed out is only 230. so i need to go back and open it up some more currently its like the same size as the ID of the powertube.

does anyone know the size of the ID that people were using with the plastic spacers?