Updated side tube pics.
My dremel halfblock.
P-12 with Vert air adapter and mag frame.
As for your mag, Rudisil, I love that frame! It matches the coating of the body very well. I hope to make a pneumag someday, as another in a string of semi-auto projects I am driven to slap together. A mechanical BPS monster doesn't suit my play at all, but man I love piecing stuff together at home.