Hi all. I have an FAL, Imbel metric receiver. The barrel length is 20 inches, with a flash hider that adds around 2-3 inches to the length. I was wondering if anyone had any feedback on having the barrel taken down to 18, or possibly 16 inches, and having it crowned and/or adapted to fit something like a vortex flash hider. I was wondering if anyone had experience with this, or knows how shortening the barrel length from 20 to 16 inches effects the ballistics. Like I said, anyone with experience or know how feel free to chime in. safe shooting.