There are several issues that you MAY have with your Norc. Your barrel could be over indexed, your flash hider may be out of spec, or your sigh may be out of spec. First things first pull the gun apart and check the indexing by inserting an allen wrench / drill bil into your gas vent hole to make sure it is at the 6 o'clock position as Pop has stated. If it is indexed properly, then you need to have a look at your flash hider and or your sight as one or both may be out of spec. A quick question, Have you shot it yet? Once you shoot it you may even find out that you have to adjust your sights to get them lined up and you may have no issues (Other than the SH!TTY Norc rear sights). Either way its not overly serious and can be worked out. Tactical Teacher is a huge help if you have indexing issues, if you contact him he will point you in the right direction just PM him.
Good Luck
W99