XM177 buffer tube worn out threads (solution)

Anybody ever had any issues with worn out threading on their Marushin XM177/M16 buffer tube? Took apart an XM177 today and while putting it back together, I must have ruined some of the threading on the buffer tube. When I pulled the charging handle back, the whole stock flew off and hit me in the chest...I was only able to properly secure it again by screwing it further into the receiver so the remaining "good" threads engaged. However, this meant the butt stock stuck out at a silly angle.

To fix it, I wrapped the worn out threading with a single layer of electrical tape. I was then able to tighten the buffer tube at the correct angle and after cocking the gun a hundred times throughout the day, the buffer tube remains securely in place. Hopefully it stays in place now because I dare not unscrew it again and I'm curious if it holds up after firing. Just thought I'd share this in case someone else has the same problem.

Perhaps silly question, but is part F117 still in place?
It is supposed to prevent the stock from screwing off, without it the tube tries to disassemble itself.
https://mp40modelguns.forumotion.net/t2897-marushin-xm177e2-kit-first-time-assembly#17965

If not, I suspect you are right. Threads are fairly soft, and I can easily imagine they get stripped