I'd offer one bit of additional info. The technique of using the BC weight to test the rings is often repeated, but not the actual method depicted in the technical manual. Instead, it states to use the second method you mentioned in your video (WP11, 11-5). Does it really matter? I'd argue yes it does. I have a Fail Zero BCG that, by 1,000 rounds, completely fails the first technique. However, when doing the second TM method, it passes and has zero gas issues when shooting suppressed or unsuppressed. According to the general consensus on the internet (not directed at you Dave) I should replace the rings, but in reality, they're fine and meet the TM test criteria.