Doesn't look like the hole goes very far into the body so retapping the probably won't be a lasting fix. Welding would probably warp something too.
Jb weld might help for a little but I think a new body will probably be your solution honesty.
08 Proto SLG: Ultralight Trigger, Freak Barrel, Featherlight Microswitch, Spring Detents, New Designz Feedneck. Plans for 7th Element board.
05 Smart Parts Impulse: NDZ Trigger, Blackheart board, Tapeworm, Evil Punch Kit. Plans for a low profile feedneck, Evil internals and respirator.