Oleg , my Bushmaster shorty has the same problem . I you stick a small pin punch through the hole in the handguard you should be able to slide the metal insert back in place , when you fire the weapon it will slide back . I tried JB weld on the shield and it did not hold . The shield slides in a groove in the plastic handguard , if you can find something to stick to both pieces it should stay put . I see no problems with it being misaligned . Good luck , Mike...