http://ar15.com/forums/topic.html?b=3&f=66&t=331734 pre, i saw your thread at AR15.com. have u realized already what caused the the kaboom's and find answers to avoid it? it would be a help if you can give us some points to avoid such accident. especially for guys here who are building their own ar15's. thanks! Wanna kill these ads? We can help!