Check to see if your gas cylinder lock is tight. Turn it in as far as it will go and then turn it back out untill it lines up correctly. Some handguards are a little loose, some say it affects accuracy. One of my Garands has a handguard that is a little loose but it doesn't affect the accuracy much, the rifle still shoots better than me. Changing the gas cylinder lock or the front handguard may help. Either way it's not a problem I would consider costly or serious, if it bothers you it can be fixed. I'm sure others will chime in with more help.