If it is a barrel bushing compensator, yoy will not gain much by using it. Perhaps a little more muzzle weight but that would be it. For a comp to work correctly the bore of the comp has to be just a tiny bit larger than the bullet diameter. The bullet would block the gasses from escaping out the front of the comp and they would be forced out the vents/ports. With a compensator that has its bore larger than the barrel outer diameter, the gasses would be allowed to flow/blow past the bullet and not be deflected out the ports.
BTDT, sold the paperweight.