Originally Posted by Ross
If there is a yellow brass tube in your gun, then you have closed bolt. If that brass tube was replaced with a hollow space of nothingness then it's open bolt.
I can verify that he has a closed bolt. Just curious to see the difference between the two NPAS kits on airsoftparts.ca.
There is this one:
The second one is obviously open bolt, so does that make the first link a closed bolt NPAS system?
Thanks for the speedy reply.