L4 mag issues

[ActionYobbo]

I'm wondering why P L has not imparted his practical experience and possible solutions to this quandry your having

Its simple really. He has no experience with striker fired semi auto rewelded brenguns that can be made with varying degrees of skill and use a multitude of new design components and pass no inspections.
Some of these builds run fantastic from day1 and others never ever run right. There is so many variables with these rewelds that need to be addressed and one of the last things needed is to drill th gas port. I have never opened up a gas port on any of my brens even the short barrel Mk3/1 and they all run on gas setting 2.