I was thinking more like a shim,not rubber but maybe plastic,so long as it didn't move and there was just enough play to allow the two halves to close without any binding.It would have to be thin yet with a reliable method of attachment.I honestly don't care to Superglue anything to my XCR so thats one reason why I haven't messed with it.I know in my mind it doesn't hurt a damn thing,but it still bugs the shit out of me nonetheless.
I love this rifle,It has so many great things about it and so few negatives,not to mention tremendous value in a category that up until recently had no real equals,and still none close to it's price or availability(please spare me the gas piston AR bit,I ain't buying it) So I can live with this one little preturbance,I do feel however that it can and will(however unfairly or ignorantly) affect peoples opinion of this awesome platform.My point is I would educate those who do not know,but they don't always take your word for it(those who know it all seldom do) and second those who we aren't around to educate are brainwashed that the fit is imperative to superb accuracy.I wish very much for this platform to succeed in a big way,It's good and more people need to know it,that's one reason why it irritates me,I hate to see anything detract from that.