





Barrel identification
I bought this barrel at a yard sale a few years ago from a guy who had just retired from the Marines, I assume he acquired it during his time in service. I know it’s FN 20 inch cage code barrel. i’d like to use it to build a M16A4 clone for my nephew who will graduate Boot Camp in a couple of months, but it does not have a F marked front sight so I’m not sure if it would work correctly with the flat top upper or not. I appreciate any help. Thanks.