I have used both handguards sold by Conneticut Shotguns (about USD45) and Galco (about USD55) for more than a dacade on every hammer double I own. They work great and stay pretty much in place IF, IF, IF you buy one size smaller, that is, 16ga for 12s and 20 gauge for 16s.

For me gloves have never been as satisfactory.

I use handguards both for trap, etc., where barrels get hot, to cold weather hunting, where handguard keeps my front hand from getting so cold, even with nice warm gloves.

Niklas