Awhewell

So I was test firing my new tracer unit and I was adjusting the hop up . It started making a clanging hitting sound so I stopped and turned the hop up down . I put a new mag in to test it again and the first thing I noticed was that the mag was moving around alot . I tried to fire it and the gun was making the firing sound but not 1 bb went into the barrel . I got this gun at Christmas. Its the lancer Tactical LT-12. Many thanks to anyone that can help