That's plain scary... I've got a shemagh identical to that one.

Anyhow, I had a DD RIS-II mount fabricated for an HK AG-C for a build earlier this week and it went together beautifully. I think you're solution with the URX is a tad more elegant though, not to mention at least a good half pound lighter

IM me your phone number, we need to talk in depth about this stuff