You're talking about this barrel?
I've never shot one, but I imagine it's basically useless I have a few one port comps which make nice barrel weights, but that's it. If I got my hands on one of these barrels I would do one of two things: chop it off at the muzzle, put a sight on it an call it a sight tracker; or heat it up, unscrew the comp and have a custom comp made to fit with three or four ports. The underlying barrel is a 5.25" threaded M15x0.75, so you would need someone familiar with Metric to make the comp (I've found it's easier said than done).
Unless you happen to know someone that has a large capable of threading metric