Hi folks, I was looking to build an 14.5" pinned m4 replica, either a govt profile or socom profile. My question is, would pinning the a2 flash hider to the barrel no longer classify it as a muzzle device. My logic is that if a pinned muzzle device satisfies the 16" barrel rule, then the device is no longer a device but has become part of the barrel. I just would like some insight if possible . Thank you. Also if anyone knows where I could aquire a pinned barrel or barrel with a complete fsb it would be great.