I recently bought a classic 556 with the tri rail and folding collapsibe stock. overall I have been quite impressed with the weapon through the first 100 rounds but have noticed a few minor problems. The one that concerned me is the bolt getting hung up just forward of the bolt catch due to so much upwards pressure from the hammer. It has only happened once while firing but catches regularly when manually charging. Is this something I can expect to go away as the weapon becomes more broke in or is it something I should be concerned with as a spec problem??