I have a glock 20 I just bought used. I tried to put a new 3.5 connector that I have had in several of my other glocks so I know it's not the connector. I put it in, and wouldn't fire so I thought. I took apart and put it back in several times, and it wouldn't fire, which led me to taking my glock back apart the long way several times. Last time I took it apart and reinstalled it, and put it together still wouldn't fire. Frustrated, I shook it in my hand and click. Thats right, shaking it made it fire. So what is the deal? What does that mean? Thanks in Advance. Wanna kill these ads? We can help!