About time I'd chime in here
For latex hand guards, you can almost use ANY glue. I like CA super glue, because of its fastness.
For MY white rubber (non latex) hand guards, which have a high silicone content, I use loctite superglue with activator pen. The glue I ever used
I don't know what Mike uses in his version, but trust his sugesstions. He's the "King of Trooper supplies"
REgarding Centurion: There aren't any details* specified (yet), as long as it's white, flexible, about the right shape, it will pass.
(details: knuckle indentions, thumb slope, tilt, etc)
Karin