The Keeper wrote:
Oh, yeah, I heard the noise after the shot to be an ejected shell as well.
Yeah I listened to it again and it is thin, tinny and has little bounces at the end. Not a two-pound steel revolver hitting the deck. AND there's a metallic sound along with the shot, like an action working. Tsk, tsk.
Was that the gun on the back of one of the Woodbury trucks? If so, it was still at the prison at the end of the episode. The truck drove over a spike strip during the attack, forcing them to leave it behind.
You're right, I lost it in the first viewing but they did abandon it there.