The hangers bars (a Bullberry innovation) comes in two sizes, based on the screw spacing of your barrels, and mount to these. At about $6 bucks apeice, they are normally left on each barrel once mounted. They in turn mount a forend by just one screw, just off center of the hanger bar. What this means, is that they were set up for Bullberry (and VVCG copied) custom forends. But, they will also work with T/C factory and Pachy forends (the single screw mounted ones) by flipping the bar end for end and rotating it 180 degrees from the way it mounts for the custom wood. The two-screw forends will work as well, but you'd have to locate and drill a new mounting hole in them in the right place. All of my custom barrels wear them - I consider them well worth the dollar spent. HTH
