Huh? I was speaking of the .30 cal MG barrel and making it look better and/or fabricating some pieces to make it better than what HL provided (See pic).

But this lengthening of the main (airsoft) gun barrel whilst retaining the airsoft function is intriguing. Can you elaborate on its construction? Is the brass tube now acting as the outer barrel or have you put a section of styrene tubing over the brass tube to make it match the rest of the barrel?

Got any pictures of this airsoft barrel upgrade?