The end that's been broken off was where the cap screwed onto the magazine tube to hold the forearm on. All the parts houses list this as an assembly with the receiver... I was asking if someone new how the magazine tube was fitted into the receiver assembly, threaded, pressed,what?? If worse comes to worse I can mig weld an extension (threaded on a lath for the new forearm cap) onto the end of the magazine tube. Unfortunately 'bubba' has already had it in his hands, he drilled a hole through the mag tube for a peg to hold the magazine spring in place. But thanks for the reply, anyway..