I am currently building my second M4gery. I have aquired a GENUINE Colt M4 14.5" barrel. I need to permanently attach the flashhider to satisfy one or more of the thousands of gun laws out there. It can either be silver soldered or drilled and pinned in place. Has anyone done this before? I paid a pretty penny for this thing and need it to be done right! I would prefer the pin method as it doesn't heat up the barrel so much. Welding is one skill I need to learn. Either that or I pay the 200.00 tax to own a short barreled rifle and I am SOOOOOOO anti-tax that seems too hypocritical. They get enough of my money!!! [postal] TAXES