Im looking right now to buy a holster. All I have shot in the past is uspsa. I am having a 6" 1911 9mm being built right now. What holsters are being used? What are the restrictions that i need to be watching out for? I talked to a uspsa open class shooter who recommended the ghost holster to me. I have also seen a few safariland holsters out there. Any other options? My 1911 does have an aristocrat rib sight on it.