To try and get back to the actual topic and help @dwa12479 If your rifle is only malfunctioning when running the one WMD bcg and you’re sure that your rifle is setup properly, then the common denominator is the WMD bcg itself. I wouldn’t start using an adjustable gas block or change buffer weights to try and get the WMD bcg to work properly. That’s only going to screw your rifle up when you try and run a properly made bcg. If it’s not functioning properly now, then something is most likely wrong with it. If the warranty only allows for getting another WMD bcg than that’s what you’ll have to go with. A properly made WMD should work fine though. If you’re able to get your money back, you can try that route and choose a different bcg from a company that I named earlier. For example BCM, Daniel Defense, Colt, SOLGW, Sionics, Noveske, Geissele...those are all most likely pretty close in price range as the WMD.