About 90% of the time the G21SF rides in a Raven Concealment Phantom set up with IWB overhooks. For my body style this conceals well under even a simple dark t-shirt. Have also used an MTAC, CTAC, Infidel with good success. Just ordered another RCS light compatible Phantom to see how that works. I am considering a Galco Jackass or Andrews Leather Monarch shoulder rig to get the weight off the hips. Not sure though as shoulder rigs and indont tend to mix well.