Screws are O.K. for what you want to do (Use lok-tite). The rivet situation was not always for ease of manufacture. We had a terrible time with M-60 receivers coming loose because the rivets were too hard. Welding was tried and made the situation worse. Finally annealed (Softened) rivets were used and the issue resolved. Screws used on a M-60 (Hard or soft) would have come loose.
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