Concealable? On a Centennial? I've got to vote for Craig Spegel's boot grips. You can get them as plain or as pretty as your wallet can stand. Checkered or smooth.
The 'high horn' style allows most folks to snug-up on the gun just a little higher which seems to direct the recoil straight back as opposed to up. Of course, YMMV. $45 for the base set is a screaming deal for custom wood stocks.
Craig Spegel - Custom Pistol Grips
Centennial on the right....
