I purchased a Springfield saint 9.6 barrel AR 15 pistol a few months ago. I like it a lot. But the last time I shot it at the range it jammed up several times. I was using Winchester 556 ammo. I clean it after every time I go to range. The one thing I did before I went to the range this time is I put a tiny piece of rubber where front pin hinge is to tighten upper to lower rattle. Could this have contributed to the issue? It has jammed in the past but not as many as this time. If this is not an issue, what are things I can do to stop the jammin? I used different magazines as well and it still jammed up.
Thanks in advance
Thanks in advance