The problem with SIRIM certification is that test are destructive, hence low volume expensinve helmets doesnt make sense to be tested by SIRIM. Say you have an ARAI model which you think will sell 5~6 units, u give 1 unit for SIRIM to test/destroy... how can you cover back your margin?

That being said, my ARAI i went cross border, bought it and wore it back... no SIRIM, but I'm not too worried about the reliability..

Yes, D-ring best for safety, my ARAI also using d-ring. My AGV using quick release buckle.