I used a small flat file (from a needle file set) and hammered it through the channel to knock out the supports.
No, I still haven't got this one working right. I've been working on other projects lately. I'm thinking I might be able to get it running by modding the firing pin, or making a new one with a chisel profile.
So, from my experience with the NaG (I've built 3, 2 have exploded)...
Issues with loading/firing/extracting are usually down to the chamber geometry. You need to sand or file a slight cone into the chamber (for extraction) and a "feed ramp" into the top and bottom of the breech end of the chamber (for feeding).
I used rifled barrel liner for all my builds. The scuttlebutt is that a smooth 6mm ID 8mm OD stainless pipe will work better, because it produces less back pressure.
The best way to taper the chamber seems to be chucking the barrel into a drill and wrapping a piece of sand paper over a small rod, held at an angle, while the barrel spins.
I thought it turned out cool. But as with most NaGs, I need to reprint the frame. I have delamination around the hammer springs. Wife likes the colors.
My first foray into .380. And the build that got me into the BLC testing program. I can't wait to visit my friend down south (with land) where I can try out the RRT on more than 2 round bursts.
Agreed with Maurice. .380 and 9mm are the same width bullet. Ecm a 9mm barrel. The chamber is smaller. When I measured a factory cut chamber, it was 17mm deep. But I'm not one hundred percent certain that'll work.
I'll get to it eventually. I took the last month off from 2a builds. I gotta get back in the groove.