There should be no problem at all. A scanner won’t pick it up at all, but a metal detector might. These are not the same, so if your airport still has the old metal detectors, you may be stopped and scanned with a handheld wand.
If you beep going through a metal detector and they stop you, they will ask if you have any medical implants… just say yes, in your hand, and they will try to wand you to find out if you have any concealed weapons. They may wand your hand to check it out but as long as they don’t see a gun in your hand, they will let you through.