I have acquired and am trying to salvage a broken AR15. It went through one, possibly more hurricanes and sat in water for several months, resulting in all the steel parts rusting beyond hope. The lower, however, was in great shape once I drove out the rear pin and opened it up. Then I discovered (and later confirmed) that the original owner, when he found his rusty AR with the stuck pins, had hammered on the rear takedown pin to "try to break that sucker loose" and, because it wasn't on a proper flat surface at the time, cracked the lower's rear threaded ring that holds the receiver extension (buffer tube), and a 1/4" section at the top fell off.
I'd really like to fix this thing myself, and cheaply, just to show it could be done. And I'd rather not send it off to a gunsmith, because that would prolly cost more than a new stripped lower.
I do have a buddy who can weld aluminum. I do not have a tap or related gear to recut the threads if we weld it up.
Would it be just too "Bubba" if I welded the extension tube right onto the lower receiver?
Flame suit on: