Interested in finding out what happened. Doesn’t seem that the trigger could be pulled with the BCG not fully forward or could it? MWS owner here and reloader. I have shot my 16” CL barrel suppressed with a SF SOCOM mini. I have an adjustable gas key from Rubber City armory that was recommended by LMT to solve the over gassing issue.
The case bulge is suspicious as it would indicate an out of battery firing. Tagged for interest.