I have purchased a couple of complete uppers from this company. I shot it once and the shell is stuck in the barrel. I pulled the bolt back and now it is stuck and wont open. I have called every day for a week and a half leaving voicemails. No response emailed customer service, no response. I am at the end of my rope. I do not like leaving bad review's but this is ridiculous! All I need to know is what is happening and how they are going to fix the situation?