When I got back from my soldier qual course and had been running on 2 hours of sleep a night for a week and a half, I was cleaning my C7 before turning it in. I put it back together, and did a function test. When I cocked it, the bolt stayed back even though there was no mag in there. I looked down and saw the buffer and spring sitting in my bush hat. Because the bolt was now stuck between the buffer tube and the upper receiver, I couldn't break it open. I managed to unscrew the buttplate and push it out with my cleaning rod before my instructors noticed.
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