THE HANDGUARD DOES NOT SCREW INTO A TYPE II LATE MODEL PRI FOREND. WHAT YOU DESCRIBE SOUNDS LIKE AN EARLY FORM OF PRI FOREND. HERE'S A PIC OF A CARBINE LENGTH ONE. DOES IT LOOK LIKE THIS WHRE IT JOINS THE RECEIVER?

[IMG]http://photos.ar15.com/ImageGallery/Attachments/DownloadAttach.asp?iImageUnq=1448[/IMG]

YOU SHOULD HAVE THREE COMPONENTS: THE FOREND OR HANDGUARD TUBE INTERNALLY THREADED ON THE AFT END, A BARREL NUT THREADED FOR THE FOREND, AND A JAM NUT. IT SOUNDS LIKE YOU'RE MISSING THE JAM NUT. TAKE IT BACK.

WES