Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: Will this fit Glock 21 .45 mags? And can it mount to a belt?
Document: Finally got it installed. That was a headache. I cross threaded one of the screws and when i was trying to get it out, the threaded insert came loose from the pouch. I had to get a friend and two pairs of vice grips to get the screws installed.
Answer: no