vz 58 custom barrel questions
I'm thinking of changing to a fluted barrel on a vz 58. I'd purchase a barrel with a gas port drilled in it. So the questions:
1. Is there some kind of guideline for the slant of the gas port into the barrel - say 45 or 60 deg angle?
2. If I'm going to go from a 16" barrel to 20", should I keep the same port point or move it to keep the relative delay before gas piston actuation?
3. Any ideas about piston configuration, since it becomes a free variable wrt shape, concavity, etc.