If you want to experiment with other rail pieces these screws are the replacement screws. I just bought a couple of spare rails to have on stash since I have a couple uppers. But these are the screws. Before I found the spare rail pieces, I wondered if there were other rails I could substitute. After finding what I needed, I gave up the hunt.
PB
MonsterBolts - #10-32 x 5/16" Low Head Socket Screws, Alloy Steel, Black Oxide, 20 Pack ( Amazon)
PB
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