Originally Posted by inmylife2415
Electro pneumatic or electro?
Just electro. I'll probably do an electro pneumatic at some point, especially now that I've got that CNC milling machine.
That frame is just a standard E99 frame. You can buy them brand new with all the components for like 10 bucks. I can't really call it an upgrade because the function of the marker is stock but it does make a big difference in achievable ROF since the pull is very short and light compared to stock.